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OCS-I/O 4 Digital DC Inputs, 4 Relay Outputs module. Positive/negative selectable logic per input. Up to 3A per relay, up to 120VAC
https://www.branom.com/shop/he959diq512-ocs-i-o-4-digital-dc-inputs-4-relay-outputs-module-positive-negative-selectable-logic-per-input-up-to-3a-per-relay-up-to-120vac-541155
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