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Check the listing for details. 12V Relay Module Cycle Timer Module Self-locking PLC Delay FRM01 Multifunction. Condition: New. Listed at 12.99 USD. Latching relay modes: CH1 interface to relay a high level pulse signal, relay, give a high pulse signal relay disconnected. Trigger relay modes: CH1 interface to a high signal relay, relay, high disappear, relay disconnected.