Catalogs > Automation Systems Catalog > I/O > In-Cabinet Distributed I/O > 1797 FLEX Ex I/O
1797 FLEX Ex I/O
| Introduction |  |
Product Design | |
Typical Configurations | |
Specifications | |
Communications Adapter | |
Digital I/O Modules | |
| Analog I/O Modules | |
Counter I/O Modules | |
HART Smart Instrumentation | |
Terminal Bases | |
Power Supplies | |
Accessory Products | |
The power supply is an essential component in the operation of an intrinsically safe system. It isolates the unsafe incoming power from the control system and limits the available energy to IS-safe levels.
FLEX Ex power supplies provide power for the FLEX Ex ControlNet network, communication adapter, I/O modules, fiber hub, and IS field devices. No other power sources are needed to operate any components attached to the FLEX Ex system in the hazardous area. Power for valves, actuators, or transmitters come from the FLEX Ex modules.
There are two types of enclosures: (N-Type) explosion-proof with 1 in. conduit pipe thread input/output terminations and (E-Type) flame-proof with increased safety input/output terminations. Each type is available in 24V dc or 85...253V ac for supply sources.
| Cat. No. | Operating Voltage Range | Input Voltage, Max. | Input Power Entry | Power Supply Output Power (W)⋆ | Power Supply Input Power | Power Dissipation | Protections Class |
| 1797-PS1N | 85…250V AC 120…250V DC |
250V AC | 1 in NPT, £ 6 in conduit allowed between power supply and seal (UL and C-UL) | 34 W | 55 W | 21 W | IP 66/NEMA 7B |
| 1797-PS1E | 85…253V AC | 253V AC | Increased safety | 34 W | 55 W | 21 W | IP 65/NEMA 7B |
| 1797-PS2N2 | 19…32V DC | 40V DC | 1 in NPT, 6 in conduit allowed between power supply and seal (UL and C-UL) 1 in NPT, 0 in conduit allowed between power supply and seal (FM) |
34 W | 55 W | 21 W | IP 66/NEMA 7B |
| 1797-PS2E2 | 18…32V DC | 40V DC | Increased safety | 34 W | 55 W | 21 W | IP 65/NEMA 7B |
| ⋆ 8.5 W at each of 4 outputs. | |||||||
Certifications
| Cat. No. | Certifications⋆ |
| 1797-PS1N | UL, C-UL: Class I Division 1 Groups A...D Class II Division 1 Groups E, F, G; Class III FM: Mounting - Class I Division 1 Groups B...D T4 IS Power - Class I Division 1 Groups A...D T4 Class I Zone 1 AEx [ib] IIC |
| 1797-PS1E | CENELEC: Series A - EEx de [ib] IIC T4 Series B - II 2G EEx de [ib] IIC T4 II 3D IP54 T90 °C INMETRO: BR-Ex ib IIB/IIC T4 |
| 1797-PS2N2 | UL, C-UL: Class I Division 1 Groups A...D Class II Division 1 Groups E, F, G; Class III FM: Mounting - Class I Division 1 Groups B...D T4 IS Power - Class I Division 1 Groups A...D T4 Class I Zone 1 AEx [ib] IIC |
| 1797-PS2E2 | CENELEC: II 2G EEx de [ib] IIC T4 II 3D IP54 T90 °C INMETRO: BR-Ex ib IIB/IIC T4 |
| ⋆ See the Product Certification link at http://www.ab.com for declarations of Conformity, Certificates, and other certification details. For additional certification information, see the FLEX Ex System Certification manual, publication 1797-6.5.6. | |