Binary input unit IM3-40B is used for the connection of 4 devices with potential-less contacts (switches, buttons, switches of other designs, PIR detectors, fire and gas detectors, etc.).

Part of the inputs can be used as a balance for alarm detectors: IM3-40B – inputs IN1, IN2

Contacts of external devices connected to the inputs of the unit can be NO or NC - input parameters are configured in the software iDM3.

Within the internal ESS configured in the iDM3 software, inputs must be set to balance or double balance.

The units generate a supply voltage of 12 V DC/75 mA for powering external intrusion detectors, so they can power PIR detectors, fire and gas detectors.

Active use 12 V DC output for powering detectors increases the nominal consumption of units from BUS (see technical data).

The units can be used for counting pulses of energy meters with pulse output.

The units are equipped with a temperature input for connecting an external two-wire temperature sensor TC/TZ (see accessories).

IM3-40B in case type B is designed for mounting into an installation box.