Digital Input module (17 opto-isolated inputs + 3 Relays) ALM-173-R1

DIN-rail digital input module for Home Assistant and ESPHome. Seventeen opto-isolated inputs with 5300 VRMS isolation for door and window contacts, PIR detectors, leak sensors and tamper loops, plus three SPDT relays rated 3 A at 250 V AC. Isolated 5 V and 12 V rails power the sensor loops from the module. Modbus RTU slave on RS-485. Zone grouping and latch-until-acknowledge run on the module. Not a certified intruder-alarm system.