Siemens 3TX7004-1LB00 Interface Relay, Cannot Be Plugged-In, Narrow Design, Screw Terminal, Output Interface With Relay Output, 1 CO Contact, 6.2mm Width, 24VAC/DC Control Supply Voltage: Din Mount Relays: Amazon.com: Tools & Home
Siemens - 6ED10551FB000BA2 - Input/Output Module, Number of Inputs: 4, Number of Outputs: 4, Power Required: 120/240VAC: Amazon.com: Industrial & Scientific
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