MSR121RT
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Description
The Allen-Bradley Guardmaster Minotaur MSR121RT is a safety monitoring relay that provides three normally open safety contacts, a normally open auxiliary contact and a solid state auxiliary output for use with interfacing to PLCs.
The MSR121RT has a versatile input arrangement. It can be connected to a single or dual channel safety gate or e-stop, a safety mat input or a light curtain that provides cross fault detection.
Reset and output monitoring is determined by the wiring configuration. Automatic/manual reset can use a jumper or can be used to check operation of external contactors. Monitored manual requires the use of a manually operated normally open momentary switch.
The MSR121RT has 3 normally open safety rated outputs. The safety outputs have independent and redundant internal contacts to help ensure the safety function. It has one normally closed auxiliary output as well as a solid state PNP auxiliary output to indicate the status of the MSR121RT to a indicator lamp or a PLC.
Features
- Category 4 per EN 954-1
- Stop category 0
- 3 Safety contacts N.O.
- 1 Auxiliary contact N.C.
- 1 Solid state PNP auxiliary contact
- Single/dual channel operation
- Cross fault monitoring
- Monitored or automatic reset
- E-stop, safety gate, safety mat or light curtain applications
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LED Indicators
| Green | Power On |
| Green | Output On |
Specifications
| Safety Ratings | |||||
| Standards | EN 954-1, ISO13849-1, IEC/EN 60204-1, IEC 60947-5-1, ANSI B11.19, AS4024.1 | ||||
| Safety Classification | Cat. 3 per EN 954-1 (ISO 13849-1) | ||||
| Functional Safety Data ⋆ Note: For up-to-date information, visit http://www.ab.com/safety |
PFHD: < 2.5 x 10-9 MTTFd: > 45662 years Suitable for performance levels Ple (according to ISO 13849-1:2006) and for use in SIL3 systems (according to IEC 62061) depending on the architecture and application characteristics |
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| Certifications | CE Marked for all applicable directives, cULus, and c-Tick | ||||
| Power Supply | |||||
| Input Power Entry | 24V AC/DC, 115/230V AC, 50/60 Hz | ||||
| Power Consumption | <4V A | ||||
| Inputs | |||||
| Safety Inputs | 1 N.C. & 1 N.O. | ||||
| Input Simultaneity | 0.5 seconds | ||||
| Input Resistance, Max. | 500 W | ||||
| Reset | Auto./Manual | ||||
| Power On Delay/Recovery Time | —/— | ||||
| Response Time | 50 ms | ||||
| Outputs | |||||
| Safety Contacts | |||||
| Auxiliary Contacts | |||||
| Thermal CurrentIlth | 4 A (nonswitching) | ||||
| Rated Impulse withstand VoltageIlth | 2500V | ||||
| Switching Current @ Voltage, Min. | 10 mA @ 10V | ||||
| Fuses, Output (External) | 5 A quick acting (external) | ||||
| Electrical Life (Operations) | 220V AC/4A/880VA cosf = 0.35…0.1 M 220V AC/1.7A/375VA cosf = 0.6…0.5 M 30V DC/2A/60W = 1 M 10V DC/0.01A/0.1W = 2 M |
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| Mechanical Life | 2,000,000 operations | ||||
| Utilization Category | |||||
| A600/AC-15 | (Ue) | 600V | 500V | 240V | 120V |
| (le) | 1.2 A | 1.4 A | 3 A | 6 A | |
| N600/DC-13 | (Ue) | 600V | 500V | 250V | 120V |
| (le) | 0.4 A | 0.55 A | 1.1 A | 2.2 A | |
| Environmental | |||||
| Enclosure Type Rating/ Terminal Protection |
IP40 (NEMA 1), DIN 0470/ IP20, DIN 0470 |
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| Operating Temperature [C (F)] | -10…+55 ° (14…131 °) | ||||
| Vibration | 0.75 mm (0.30 in.) peak, 10…55 Hz | ||||
| Shock | 30 g, 11 ms half-sine | ||||
| Physical Characteristics | |||||
| Mounting | 35 mm DIN Rail | ||||
| Weight [g (lb)] | 210 (0.46) | ||||
| Conductor Size, Max. | 1 x 2.5 mm2 (14 AWG) stranded, 1 x 4 mm2 (12 AWG) solid | ||||
| ⋆ Usable for ISO 13849-1:2006 and IEC 62061. Data is based on the following assumptions: - Mission time/Proof test interval of 20 years - Power cycled once per 8 hrs |
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Product Selection
| Inputs | Safety Outputs | Auxiliary Outputs | Power Supply | Cat. No. |
| 1 N.C., 2 N.C., LC or SM | 3 N.O. | 1 N.C. and 1 PNP Solid State | 24V AC/DC | 440R-J23102 |
| 115V AC | 440R-J23100 | |||
| 230V AC | 440R-J23099 | |||
Approximate Dimensions
Dimensions are shown in mm (in.). Dimensions are not intended to be used for installation purposes.
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Block Diagram
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Typical Wiring Diagrams
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| 24V DC Light Curtain 115/230V AC Safety Relay, Monitored Manual Reset, Monitored Output | Safety Mat Monitored Manual Reset, Monitored Output | |
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| Dual Channel E-Stop, Monitored Manual Reset, Monitored Output | Single Channel Safety Gate, Automatic Reset, No Output Monitoring | |