| A212-24 | 24V dual channel control monitor |
| A212-120 | 120V dual channel control monitor |
| A210-24 | 24 VDC |
| A210B-24 | with bypass timer, 24 VDC |
| A210R-24 | with external reset switch, 24V DC |
| A210-120 | 120V AC |
| A210B-120 | with bypass timer, 120 / 240 VAC |
| A210R-120 | with ex reset switch, 120 VAC |
