| AC Input | 120VAC @ 60Hz |
| Standby Power | 24VDC standby batteries |
| Charging Capability | 4 to 12 AH |
| Indicating Circuits | Power limited / 24VDC unfiltered / 1.7A @ 49°C per circuit. Maximum 5 Amps. |
| Unfiltered supply (full wave rectified) | Power limited / 24VDC unfiltered / 1.7A max at 49°C |
| Auxiliary Relays (Common alarm/supv/trb/ and auxiliary second alarm) | FormC / 28VDC / 1A max |
| Current Consumption | ||
| Model | Standby | Alarm |
| MR-2306-DDR | 142 mA (112 mA*) | 312 mA (282 mA*) |
| MR-2312-DDR | 174mA (104 mA*) | 444mA (394 mA*) |
| MR-2312-LDR | 164mA (104 mA*) | 424mA (364 mA*) |
