1771-A4B by Allen Bradley ALLEN BRADLEY SERIES B 16 SLOT I/O CHASSIS 5 VOLT BACKPLANE 24 AMPS AT 5.25 VDC MAX. BACKPLANE MEMORY LINE 0.5 AMPS AT 5.25 VDC MAX. CAT# 1771-A4B Reconditioned New Surplus Make an Offer Send to a Friend WHSE Code: M9B1 Return To Misc Electrical Components and Parts