CRD Family Relays & Switches
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The CRD series setpoint relay is designed when the signal is set for UNDER RANGE, the output relay will energize when instrument power is applied and the current is above the setpoint threshold. It will remain in a “Fail Safe” mode until either the input current drops below the setpoint threshold or instrument power is removed. For OVER RANGE the output relay will energize when instrument power is applied and will remain in a “Fail Safe” mode until either the instrument power is removed or the input current exceeds the set point threshold level.