Safety Isolation System
|
| Typical System |
Description
The ElectroGuard system is designed to simplify the Lock Out/Tag Out (LOTO) task performed by a machine operator or maintenance personnel. The ElectroGuard system can control single or multiple energy sources simultaneously. Simplifying the procedure helps increase the likelihood that personnel will perform the LOTO on large processors or drive systems.
-
The ElectroGuard system can be configured with modules to provide:
- Electrical energy isolation (ElectroGuard Power Panel).
- Pneumatic energy isolation (Pneumatic Isolation Module).
- Hydraulic energy isolation (Hydraulic Isolation Module).
- Multiple lockout points (Remote Lockout Stations).
- Control of multiple systems (System Multiplexer/Permissive or Dual RLS).
- Interface to safety-gate interlocks (Verification Module).
The ElectroGuard allows the system engineer to design LOTO into the system. Locating the Remote Lockout Stations (RLS) at hazard entry points can result in the shortest down time during set-up or maintenance.
Standard Features
- System is designed to prevent accumulation of faults.
- Standard system provides for four RLS on the 23…85 A systems and up to six RLS on the 110…1200 A systems.
- Verification light on the RLS (no light means no entry).
- Meets International Standard EN 954-1/ISO 13849-1, TÜV certified Category 4 system.
- Pneumatic and hydraulic ready.
Optional Features
- Expansion modules allow for additional RLS connections.
- Pneumatic and hydraulic energy isolation.
- System multiplexer/permissive module allows for control of multiple energy sources simultaneously.
- Network communication option provides the control system with status.
Specifications
| Certifications | cULus TÜV Rheinland Certified CE marked for all applicable directives |
| Standards | IEC/EN 60204-1 IEC/EN 60439-1 Category 4 to EN 954-1/ISO 13849-1 98/37/EC Machinery Directive 89/336/EC EMC Directive 73/23/EC Low Voltage Directive UL508A |
| Estimated Component Life Remote Lockout Station Power Contactors (Isolation & Grounding) | 23… 85 A: 2,000,000 operations 110…1200 A: 1,000,000 operations |
| Storage Temperature [C (F)] | -10…+60° (14…140°) |
| Operating Temperature [C (F)] | 0…+40° (32…104°) |
| Relative Humidity (noncondensing) | 90% (Ambient) |
| Power Panel Construction | NEMA Type 12/IP54 UL Type 4/IP66 UL Type 4x MCC (Bulletin 2100) with and without Bus |
| Expansion Module Construction | 4-port: Supports up to 4 remote lockout stations 10 port: Supports up to 10 remote lockout stations |
| Safety Isolation System Inputs | Remote Lockout Stations |
| Input Options | Safety Mats, Light Curtains, and E-Stop Stations |
| System Operational Limits | +10%, -15% of the line voltage |
Sequence of Operation
After using the normal stopping method of the machine or process, the machine operator turns a Remote Lockout Station (RLS) handle from the ON to the OFF position.
The RLS signals the:
1. Isolation contactors (1IC and 2IC) to drop out, isolating the supply voltage from the loads (see Power Circuit below).
2. The grounding contactor (GC) is then energized, connecting the load to ground (see Power Circuit). The grounding contactor and the isolation contactors are both electrically and mechanically interlocked.
3. The System Isolated light will then illuminate on the RLS to indicate the system is isolated.
4. The person performing the LOTO then applies a lock to the RLS, locking it in the OFF position. The equipment is now locked out.
|
| Power Circuit |
ElectroGuard Factory Installed Options
Communication
The optional Communication Module allows the ElectroGuard system to communicate status to the process or machine control system. Although the communication module can be field installed, it is recommended that this option be ordered as part of the ElectroGuard system. The customer is responsible for configuring and programming their control system to receive the status signals from the ElectroGuard.
-
Status signals available:
- Overall system status
- Remote lockout station (status of each station)
- Pneumatic or hydraulic isolation modules (if used)
- Other optional safety input devices
-
Current networks available¬ :
- DeviceNet™
- Remote I/O
- ControlNet™
- Ethernet IP
- PROFIBUS
See the ElectroGuard or accessories for ordering instructions.
|
The communication option allows a remote PLC to receive status signals from the ElectroGuard safety isolation system. |
Door Mounted Metering
Optional door mounted ampere meter, volt meter, or both, are available as factory installed options. They provide visual indication of line side system current and voltage. See the ElectroGuard or accessories for ordering instructions.
Expansion Module
Expansion Modules are used to add more Remote Lockout Stations in addition to the base inputs (four remote lockout stations for 23…85 A units and six for the 110…1200 A systems). See expansion module section for details.
Multiplexer and Multiplexer Permissive
The Multiplexer Module allows the Remote Lockout Station to control two or more ElectroGuard systems. The permissive function allows the equipment control system to determine if the ElectroGuard can be locked out. See Multiplexer and Multiplexer Permissive section for sequence of operation and details.
|
|
Only one of these options can be installed in the power panel, and are not available on the 23…85 A units, or 2031-A0630JX or 2031-A860JX units. |
Product Selection
ElectroGuard cat. nos. can be configured by selecting the appropriate codes from the tables below.
| 2302 | — | A | 0420 | J | B | — | 29J | — | 1TD | |||
| a | b | c | d | e | f | g |
| a | |
| Safety Type | |
| Code | Description |
| 2031 | Noncombination |
| 2032 | Fusible Disconnect |
| 2033 | Thermal-Magnetic Circuit Breaker |
| b | |
| Construction Code | |
| Code | Description |
| A | Free-standing enclosure |
| B§ | Motor control center enclosure for North America with line side incoming power cables and 1200 A load side outgoing bus¬ . |
| F§ | Motor control center enclosure for North America with line side incoming power cables and 600 A load side outgoing bus¬ . |
| M§ | Motor control center enclosure for North America with 600 A line side incoming bus¬ and outgoing power cables. |
| S§ | Motor control center enclosure for North America with 1200 A line side incoming bus¬ and outgoing power cables. |
¬ Bus Type: copper with tin plating.
§ Only available in NEMA Type 12/IP54.
| c | ||||||||||
| Ratings¬ | ||||||||||
| Ampere Rating (AC-3) |
3-Phase Max. Hp rating (60Hz) | 3-Phase Max. kW rating (50 Hz) | 2032 Fuse Clip OptionsT | 2033 Circuit Breaker Options‡ | ||||||
| 200V | 230V | 460V | 575V | 230V | 400V | 500V | 600V | |||
| 0023 | 5 | 7.5 | 15 | 15 | 7.5 | 11 | 11 | 11 | 24B, 24J, 25B, 25J | 39, 39k, 40, 40k, 41, 41k, 42, 42k |
| 0043 | 10 | 15 | 30 | 30 | 13 | 22 | 22 | 22 | 25B, 25J, 26B, 26J | 40, 40k, 41, 41k, 42, 42k, 43, 43k, 44, 44k, 45 |
| 0085 | 25 | 30 | 60 | 60 | 25 | 45 | 45 | 45 | 26B, 26J, 27B, 27D, 27J | 42, 42k, 43, 43k, 44, 44k, 45, 46, 46k, 47, 47k, 48, 48k |
| 0110 | 40 | 40 | 74 | 100 | 32 | 55 | 63 | 100 | 27B, 27D, 27J, 28B, 28D, 28J | 45, 46, 46k, 49, 49k, 50k |
| 0180 | 50 | 60 | 150 | 150 | 55 | 90 | 110 | 160 | 27B, 27D, 27J, 28B, 28D, 28J | 47, 47k, 48, 48k, 50k, 51, 51k, 52, 52k, 55k |
| 0210 | 60 | 75 | — | 200 | 63 | 110 | 150 | 200 | 28B, 28D, 28J | 48, 48k, 49, 49k, 53, 53k, 54, 54k, 59k |
| 0300 | 100 | 125 | 250 | 300 | 90 | 160 | 200 | 300 | 28B, 28D, 28J, 29B, 29D, 29J | 49, 49k, 50k, 51, 51k, 53, 53k, 54, 54k, 55k, 56, 56k, 57, 57k, 58, 58k, 59, 59k |
| 0420 | 150 | 175 | 350 | 400 | 132 | 220 | 300 | 425 | 29B, 29D, 29J, 30B, 30D, 30L | 51, 51k, 52, 52k, 53, 53k, 55k, 57, 57k, 58, 58k, 59, 59k, 60, 60k, 61, 61k, 62, 62k, 63, 63k, 64k |
| 0630 | 200 | 250 | 500 | 600 | 200 | 355 | 450 | 500 | 30B, 30D, 30L, 31B, 31D, 32B, 34L | 53, 53k, 54, 54k, 55k, 56, 56k, 59, 59k, 60, 60k, 61, 61k, 62, 62k, 63, 63k, 64k, 65k, 66k |
| 0860 | 250 | 300 | 600 | 700 | 250 | 500 | 560 | 600 | 31D, 32B, 34L | 56, 56k, 57, 57k, 58k, 59k, 60k, 61k, 62k, 63, 63k, 64k, 65k, 66k |
| 1200 | 450 | 450 | 900 | 900 | 391 | 710 | 888 | 1043 | 31D, 34L | 57, 57k, 58, 58k, 59, 59k, 60, 60k, 61k, 62k, 63, 63k, 64k, 65k, 66k |
¬ Consult your local Rockwell Automation sales office or Allen-Bradley distributor for additional options.
T Available for 2032 fusible discconect only.
‡ Available for 2033 Thermal-Magnetic circuit breaker. Consult your local Rockwell Automation sales office or Allen-Bradley distributor for additional options.
| d | |
| Enclosure Type | |
| Code | Description |
| C§ | Type 4X watertight stainless steel |
| F§ | Type 4 watertight painted steel/IP65 |
| J | Type 12 dusttight/IP54 |
§ Cooling to be supplied by customer.
| e | |
| Input Line Voltage | |
| Code | Description |
| A | 240V 60 Hz/220V 50 Hz |
| B | 480V 60 Hz/440V 50 Hz |
| C | 600V 60 Hz/550V 50 Hz |
| G | 400…415V 50 Hz |
| H | 208V/60 Hz |
| M | 500V 50 Hz |
| N | 380…400V 50 Hz |
| f | ||
| 2032 Fuse Clip Rating/Type§ |
||
| Code | Rated Amps [A] | Fuse Type |
| 24B | 32 A | BS88 |
| 24J | 30 A | Class J |
| 25B | 60 A | BS88 |
| 25J | 60 A | Class J |
| 26B | 100 A | BS88 |
| 26J | 100 A | Class J |
| 27B | 200 A | BS88 |
| 27D | 160 A | DIN |
| 27J | 200 A | Class J |
| 28D | 250 A | DIN |
| 28J | 400 A | Class J |
| 29B | 400 A | BS88 |
| 29D | 400 A | DIN |
| 29J | 600 A | Class J |
| 30B | 600 A | BS88 |
| 30D | 630 A | DIN |
| 30L | 800 A | Class L |
| 31B | 800 A | BS88 |
| 1D | 1600 A | DIN |
| 32B | 1250 A | BS88 |
| 34L | 2000 A | Class L |
§ Fuse to be supplied by customer per local electrical code.
| f | |||
| 2033 Circuit Breaker Hp/kW RatingØ |
|||
| Code | Hp | Code | Power |
| 39 | 5 Hp | 39k | 4 kW |
| 40 | 7.5 Hp | 40k | 5.5 kW |
| 41 | 10 Hp | 41k | 7.5 kW |
| 42 | 15 Hp | 42k | 11 kW |
| 43 | 20 Hp | 43k | 13 kW |
| 44 | 25 Hp | 44k | 15 kW |
| 45 | 30 Hp | — | — |
| 46 | 40 Hp | 46k | 22 kW |
| 47 | 50 Hp | 47k | 25 kW |
| 48 | 60 Hp | 48k | 32 kW |
| 49 | 75 Hp | 49k | 37 kW |
| — | — | 50k | 45 kW |
| 51 | 125 Hp | 51k | 55 kW |
| 52 | 150 Hp | 52k | 63 kW |
| 53 | 175 Hp | 53k | 75 kW |
| 54 | 200 Hp | 54k | 90 kW |
| — | — | 55k | 100 kW |
| 56 | 250 Hp | 56k | 110 kW |
| 57 | 300 Hp | 57k | 132 kW |
| 58 | 350 Hp | 58k | 150 kW |
| 59 | 400 Hp | 59k | 160 kW |
| 60 | 450 Hp | 60k | 185 kW |
| 61 | 500 Hp | 61k | 200 kW |
| 62 | 600 Hp | 62k | 220 kW |
| 63 | 700 Hp | 63k | 250 kW |
| — | — | 64k | 300 kW |
| — | — | 65k | 355 kW |
| 66 | 900 Hp | 66k | 390 kW |
Ø Consult your local Rockwell Automation sales office or Allen-Bradley distributor for additional circuit breaker options.
| g | |
| Factory-Installed Options | |
| Code | Description |
| 1AMz | Single-phase ampere meter |
| 3AMz | 3-phase ampere meter |
| 1VMª | Single-phase voltmeter |
| 3VMª | 3-phase voltmeter |
| 1COMv | Remote I/O module (16 points of I/O) |
| 1CNETv | ControlNet™ module (16 points of I/O) |
| 1DNETv | DeviceNet™ module (16 points of I/O) |
| 1ENETv | EtherNet module (16 points of I/O) |
| 1PNETv | PROFIBUS module (16 points of I/O) |
| 1TD | Control module with factory-set 30-second time delay |
| 1EUFª | Four port expansion module |
| 1EUTª | Ten port expansion module |
| 1SYSª | System multiplexer module |
| 1SYSPª | System multiplexer permissive module |
| 1HPMª | Hydraulic/pneumatic multiplexer module |
z Only one can be selected for current monitoring.
ª Only one can be selected for voltage monitoring.
v Only one of these can be installed in ElectroGuard.
ª No module can be installed in the 23 A, 43 A and 85 A units and the 2031-x0630xx and 2931-x860xx units.
Replacement Control Module
2030-CH0085x
2030-CH0085x-ITD
2030-CH1200x
2030-CH1200x-ITD
x = See table "e" for input line voltages
|
| 1-1/2 in. Pneumatic Isolation Module |
Pneumatic Isolation Module
The ElectroGuard Safety Isolation System is available with an optional means of isolating the pneumatic energy source for the machine or process. The Pneumatic Isolation Module is designed to work in conjunction with the power panel. This option blocks the pneumatic line leading to the pneumatic hazard. The valve then bleeds or dumps the residual pneumatic energy leading to the machine. After the valve is in the blocked position and the pressure drops to less than five psi (pounds per square inch), a signal is sent to the power panel indicating the pneumatic energy is isolated. The system isolated light, located on the Remote Lockout Station (RLS) that was switched to the OFF position, is then illuminated.
|
| Hydraulic Isolation Module |
Hydraulic Isolation Module
The ElectroGuard Safety Isolation System is available with an optional means of isolating the hydraulic energy source for the machine or process. The Hydraulic Isolation Module is designed to work in conjunction with the power panel. The valve blocks the hydraulic line leading to the hydraulic hazard. Then the residual hydraulic energy is returned to the tank. After the valve is in the blocked position and the pressure drops to less than 100 psi (pounds per square inch), a signal is sent to the power panel indicating the hydraulic energy is isolated. The system isolated light, located on the RLS that was switched to the OFF position, is then illuminated.
Bulletin 2030 Pneumatic and Hydraulic Isolation Modules
| 2030 | — | P | J | 120 | 4 | |||
| a | b | c |
| a | |
| Product Descriptor | |
| Code | Description |
| P | Pneumatic isolation module |
| H | Hydraulic isolation module |
| b | |
| Enclosure Type | |
| Code | Description |
| C | Type 4X watertight stainless steel |
| F | Type 4 watertight painted steel/IP65 |
| J | Type 12 dusttight/IP54 |
| c | |||
| Port Size | |||
| Code | Description | Pneumatic CFM at 90 PSI | Hydraulic GPM |
| 2 | 1/2 in. NPT | 160 | T |
| 3 | 3/4 in. NPT | 380 | 25 |
| 4 | 1 in. NPT | 650 | T |
| 5 | 1-1/4 SAE #20 straight thread | ¬ | 120 |
| 6 | 1-1/2 in. NPT | 1750 | T |
¬ Not available in Pneumatic Isolation Module
T Not available in Hydraulic Isolation Module
CFM = Cubic feet per minute
GPM = Gallons per minute
NPT = National pipe thread
SAE = Society of Automotive Engineers
|
| 4-Port Expansion Module |
Optional Expansion Module
Optional Expansion Modules are available for applications requiring more than the maximum allowable Remote Lockout Stations (RLS) (e.g. more than four for 23…85 A systems or more than six for 110…1200 A systems). The Expansion Modules are available in 4- or 10-port configurations. This allows up to four RLSs for a 4-port and ten RLSs for a 10-port module. An example would be adding a 4-port expansion module to a 23A ElectroGuard. This then allows up to seven RLSs to connect to the system.
Expansion Modules may be ordered with an adjustable time-delay feature (1…30 seconds) in order to allow time for the machine operator to shut down drives or other equipment that requires a controlled stop after a RLS handle has been turned to the OFF position. Consult your Rockwell Automation sales office or AllenÂBradley distributor for other time settings. Enclosed Expansion Modules are available with optional Flex modules to provide status communication to a remote PLC. Communication can be via ethernet, ControlNet, DeviceNet, Profibus or Remote I/O.
NOTE: The status communication option allows a remote PLC to receive status signals from the Expansion Module.
Bulletin 2030 Expansion Module
| 2030 | — | EU | N | F | 1CNET | 1TD | ||||
| a | b | c | d | d |
| a | |
| Product Descriptor | |
| Code | Description |
| EU | Expansion module |
| b | |
| Enclosure Type | |
| Code | Description |
| C | Type 4X watertight stainless steel |
| F | Type 4 watertight painted steel/IP65 |
| J | Type 12 dusttight/IP54 |
| N | Open type |
| c | |
| Number of Expansion Ports | |
| Code | Description |
| F | 4-port |
| T | 10-port |
| d | |
| Options | |
| Code | Description |
| 1COM | Flex I/O module (16 points of I/O) |
| 1CNET | ControlNet™ module |
| 1DNET | DeviceNet™ module |
| 1ENET | EtherNet module |
| 1PNET | PROFIBUS module |
| 1TD | Expansion module with factory-set 30-second time delay |
|
|
| Remote Lockout Station |
Remote Lockout Station
The Remote Lockout Station (RLS) is a key component of the ElectroGuard system. The RLS is typically located at the hazard location and provides the signal to the power panel to initiate the LOTO process. The RLS is available in several configuration and enclosure types.
Dual Remote Lockout Station
The Dual Remote Lockout Station functions the same as a single or standard Remote Lockout Station. The difference between a single and a dual RLS is that the dual RLS can be used to control two ElectroGuard systems from the same RLS. A good example of this is a machine that has two separate incoming power sources. Using a dual RLS and two ElectroGuard both ElectroGuard can be controlled from the same station.
Bulletin 2030 Remote Lockout Station
| 2030 | — | RLS | J | G | D | |||
| a | b | c |
| a | |
| Enclosure Type | |
| Code | Description |
| C | Type 4X watertight stainless steel |
| F | Type 4 watertight painted steel/IP65 |
| J | Type 12 dusttight/IP54 |
| E | Type 7 and 9 hazardous location bolted |
| b | |
| System Isolated Light Color | |
| Code | Color |
| G | Green |
| c | |
| Dual RLS | |
| Code | Description |
| D | Dual |
| Blank | Single |
Replacement Switch Module: 2030-RSA1
|
| Verification Module |
Verification Module
The optional Verification Module (VM) is connected between the solenoid locking safety switch, similar to a Guardmaster Atlas™ 5 and the Remote Lockout Station (RLS) input on an ElectroGuard system. When the VM receives the system isolated signal from the ElectroGuard, the VM provides the signal to the solenoid on the Atlas 5, unlocking the Atlas 5 and allowing access to the machine.
Once the Atlas 5 is unlocked, the VM provides a redundant signal to the ElectroGuard emulating a RLS that has been switched to the OFF position. The emulated signal is then switched to the on state, to indicate the gate has been closed. If all of the RLSs connected to the ElectroGuard are switched to the ON position and the safety gate is closed, the ElectroGuard will attempt to lock the gate and restore energy the machine. If the verification module has not verified the gate is locked, the energy is removed from the machine and the locking process is repeated.
Specifications
Dry Contact (B300 6A/125V AC or P300 3A/24V DC) provided to control solenoid voltage.
Bulletin 2030 Verification Module
| 2030 | — | VM | C | |
| a | b |
| a | |
| Product Description | |
| Code | Description |
| VM | Verification module |
| b | |
| Enclosure Type | |
| Code | Description |
| C | Type 4X watertight stainless steel |
| J | Type 12 dusttight/IP54 |
Multiplexer/Permissive Module
When multiple energy sources must be controlled simultaneously or the system must be stopped at a pre-determined stopping point, the LOTO process becomes more complicated with multi-step procedures and locks. The Hydraulic/Pneumatic Multiplexer and the system Multiplexer/Permissive Module were developed to help provide simultaneous control of multiple hazards from a single lockout point.
Coordination between the process or drive system control and the LOTO process, is a concern. In a typical system, a signal from the LOTO device is sent to the control system. This provides indication that the device has been switched to the OFF position. This requires the person switching the device to ensure the process or machine has stopped. Ideally this would be coordinated so the power is not disconnected until the process or drive system is at an acceptable stopping point. The addition of the Permissive function to the System Multiplexer allows the control system to signal the ElectroGuard system when it is at the desired stopping point. This function would only allow the stopping function (i.e., the control system can not restore power). That function can only be accomplished via the RLSs attached to the System Multiplexer/Permissive Module.
The diagram below depicts a system with multiple motors or drives that require a synchronized lockout. This system also requires that the power to the drives must be maintained during certain phases of the process. The control system is interfaced with the ElectroGuard systems via the Permissive option in the System Multiplexer/Permissive Module. This allows the control system to delay disconnecting power until the drives are at an allowable point in the process.
Functional Description
The System Multiplexer Module allows a Remote Lockout Station (RLS) to control up to four ElectroGuard systems simultaneously. The System Multiplexer Module will accept up to six RLS inputs. If there is a need to control more than four ElectroGuard systems, the System Multiplexer Modules can be daisy-chained as shown in the drawing below. For applications where more than four RLSs are required, an expansion module may be used.
The System Multiplexer Module is also available with a Permissive option. The Permissive option allows the machine controlling the process or drive system to bring the machine or process to a pre-determined stopping point prior to removal of power by the ElectroGuard system. Once the ElectroGuard system isolates the energy, the machine control can not re-energize the ElectroGuard.
Sequence of Events for System Multiplexer Module:
| 1. | When a RLS is turned OFF, the outputs of the System Multiplexer Module are switched to the off or open state, see diagram below. |
| 2. | This signal is connected to the input of the ElectroGuard systems initiating the isolation process. |
| 3. | When all of the ElectroGuard systems are in the isolated state the System Multiplexer Module sends the Isolated signal to the RLS and the RLS System Isolated pilot light will be illuminated. |
Sequence of Events for System Multiplexer Module with Permissive Option:
| 1. | A PLC output is connected to the System Multiplexer/Permissive Module. This signal is used by the System Multiplexer/Permissive Module as a heart beat. This holds the output of the System Multiplexer/Permissive Module in the on or closed state, holding the ElectroGuard system in the on or non-isolated state. |
| 2. | When a RLS is turned OFF, a signal is transmitted to the control system via a PLC connection on the RLS auxiliary contacts, see diagram below. Note that the outputs of the System Multiplexer/Permissive Module remain in the on or closed state. |
| 3. | When the customer’s control system is at a predetermined stopping point, the control system, via the PLC output, is turned to an off state (no heart beat) and the outputs of the System Multiplexer/Permissive Module are then switched to the off or open state. |
| 4. | The system isolation function is then initiated on all of the ElectroGuard systems simultaneously. |
| 5. | When all of the ElectroGuard systems are in the isolated state, the System Multiplexer/Permissive Module sends the Isolated signal to the RLS and the RLS System Isolated pilot light on the RLS will be illuminated. The RLS now has control of the ElectroGuard and the energy can only be restored to the machine or process by switching all of the RLSs connected to the multiplexers to the on state. |
| NOTE: Modification to the logic in the customer’s control system is required if the Permissive option is used. See user manual for details. |
|
| Multiple Energy Sources |
Bulletin 2030 Multiplexer/Permissive Module
| 2030-MLX | — | J | F | SYS | ||
| a | b | c |
| a | |
| Enclosure Type | |
| Code | Description |
| C | Type 4X watertight stainless steel |
| F | Type 4 watertight painted steel/IP65 |
| J | Type 12 dusttight/IP54 |
| N | Open |
| M | Open Type installed in ElectroGuard¬ |
¬ Can be installed in most 110…1200 A systems
| b | |
| Number of Systems to Control | |
| Code | Description |
| F | 4 systems |
| c | |
| System Type | |
| Code | Description |
| SYS | EG system |
| SYSP | EG system with permissive option |
| HPM | Hydraulic/pneumatic module |
System Selection Process
| 1. | Determine the catalog number of the Safety Isolation System based on the rating of the load(s) to which it will be connected as follows: |
| — If the Safety Isolation System is connected to a single motor load, the horsepower or kilowatt rating of the system should be determined as follows: | |
| a. Select the Safety Isolation System that meets or exceeds the horsepower or kilowatt rating of the load at the required voltage and frequency. | |
| — If the Safety Isolation System is connected to two or more motors or one or more motors in combination with other loads; the horsepower or kilowatt rating of the system should be determined as follows: | |
| b. Identify the types of loads (i.e. motor, resistive) and the values of the currents of each of the loads (i.e. steady-state current for resistive loads, full-load and locked-rotor currents for motor loads) to be connected to the Safety Isolation System. | |
| c. Sum the full-load currents of all the motor loads to be connected to the Safety Isolation System. To this value add the current values of all resistive loads to be connected to the Safety Isolation System. This value is the combined load full-load current. | |
| d. Find the horsepower or kilowatt rating of a single motor with a full-load current value greater than or equal to the combined load full-load current value determined in step b. | |
| e. Select the Safety Isolation System that meets or exceeds this horsepower or kilowatt rating at the required voltage and frequency. |