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Description
| Brand | Allen-Bradley |
| Part Number/Catalog No. | 1756-RM2 |
| Series | ControlLogix |
| Module Type | Enhanced Redundancy Module |
| Connector | LC Type |
| Cable Type | 8.5/125 micron single-mode fiber-optic cable |
| Connector Cables | 1756-RMC1, 1 m (3.28 ft); 1756-RMC3, 3 m (9.84 ft);1756-RMC10, 10 m (32.81 ft) |
| Supported Controllers | Logix 5560 /Logix 5570 |
| Length | 10 kilometers |
| Wavelength | 1310 Newton Meters |
| Transmission | 1000 MB per Second |
| Channels | 1 |
| UPC | 884951800434 |
| UPC | 884951800434 |
| Wire Size | 20 AWG |
| Dimensions | 5.51 x 4.41 x 5.71 inches |
| Operating Temperature | 32-140 Fahrenheit (0-60 Celsius) |
| Enclosure | None |
The Allen-Bradley 1756-RM2 is a ControlLogix Redundancy Module. It has enhanced features with speeds of up to 1000 Mbps. When paired with 1756-L7x controllers in both chassis, it gives the best scan performance. For cross loading, the 1756-RM2 uses redundant fiber ports with no single point of failure. During channel switchover, the processing chassis remains synched while the scan time may encounter a delay of around 10 ms. It has enhanced safety features with interference-free diagnostics.
The 1756-RM2 redundancy module draws 1.16 A current at 5.1V DC and 3.4 mA at 24V DC. It has a maximum power dissipation of 6W and a thermal dissipation of 21 BTU/hr. It can be installed in any slot in a ControlLogix chassis. The 1756-RM2 weighs 0.64 lbs. and it has an open enclosure. For communication, it supports up to seven enhanced ControlNet and EtherNet/IP communication modules. For wiring, the 1756-RM2 supports 1756-RMC1, 1756-RMC3 and 1756-RMC10 cable with 1m, 3m and 10m lengths respectively.
