Allen Bradley 1757-SRM

ProcessLogix & ControlLogix System Redundancy Module; Supported Controllers: one 1756-L61, 1756-L62, 1756-L63, 1756-L64 controller; Supported Communication Modules (Maximum Seven modules): 1756-CNB series D or E, 1756-CNBR series D or E, 1756-ENBT, or 1756-EWEB modules