12 or 24VDC selectable operation. 3~24VDC, 1mA positive or negative trigger. Double form "C" 2A, 120VAC/28VDC contacts. Mfr. #RBSN-TTL.
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MCM Cat 57, Page 545
MCM Cat 56, Page 510
I have used MCM for many years and would give high recommendation for getting the job done right.