6ES7492-1AL00-0AA0 SIEMENS ⍾ 6ES74921AL000AA0

SIMATIC S7-400, rack UR2, central and distributed with 9 slots, 2 redundant PS can be plugged in

SIMATIC S7-400, rack aluminum UR2, central and distributed with 9 slots, 2 redundant PS can be plugged in

SIMATIC S7-400, rack UR1, central and distributed with 18 slots, 2 redundant PS can be plugged in

SIMATIC S7-400, rack UR1 Alu, central and distributed with 18 slots, 2 redundant PS can be plugged in

SIMATIC S7-400H, rack UR2-H, central and distributed with 2 x 9 slots,

SIMATIC S7-400, rack aluminum UR2-H, central and distributed with 2 x 9 slots

SIMATIC S7-400, rack CR3, central with 4 slots

SIMATIC S7-400, CR2 RACK, CENTRALIZED,18 SLOTS,2 SEGMENTS 2 REDUNDANT PS PLUGGABLE

SIMATIC S7-400, ER2 EXP. RACK, WITH 9 SLOTS, F. SIGNAL MODULES ONLY, 2 REDUNDANT PS PLUGGABLE

SIMATIC S7-400, ER2 EXPANSION RACK ALU, WITH 9 SLOTS, FOR SIGNAL MODULES ONLY, 2 REDUNDANT PS PLUGGABLE

SIMATIC S7-400, extension rack ER1 with 18 slots, only for signal modules 2 redundant PS can be plugged in

SIMATIC S7-400, ER1 EXPANSION RACK ALU, WITH 18 SLOTS, FOR SIGNAL MODULES ONLY, 2 REDUNDANT PS PLUGGABLE