Mircom MIX-4045 — 4000 Series addressable dual relay module, two Form C outputs on a single SLC address.Relay points tend to be needed in pairs: elevator recall plus power shunt, fan shutdown plus damper. The MIX-4045 gives two independently controlled SPDT contacts while consuming one loop address, which matters on a nearly full SLC. It verifies contact position and reports a stuck contact as a trouble; circuits wired to the contacts are not supervised. Two independently controllable Form C (SPDT) contacts, one module address Contacts rated 2 A @ 30 VDC or 0.5 A @ 125 VAC 15–30 VDC; standby 1.5 mA, alarm 3.1 mA; panel-controlled LED SLC and non-power-limited terminals on opposite sides, so no added barrier is needed 4-5/8" × 4-1/4" × 1-1/8"; 22–12 AWG terminals Addressing needs the MIX-4090 programmer tool, not rotary dials — budget for one if your crew does not carry it. Requires a 4" square box at least 2-1/8" deep. For MGC-compatible panels; up to 240 MIX-4000 devices per loop.