The polarized RIB® series is equivalent to the standard RIB® series, except for the coil input, which is polarity sensitive when driving the relay with DC voltage. The “FA” suffix in the model name stands for “fire alarm” and indicates the unit accepts a polarity sensitive input through the signaling circuit. These relays are designed for operation in systems that require supervision from controllers that utilize end-of-line resistors. These relays can also be operated from A/C voltage (non-polarized), if desired.

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