621-1550
Availability: In Stock
24VAC/VDC Input- 16 point
Model 621-1550 24 Vac/Vdc Discrete Input module
A separate connection to L1/+Vdc is needed when the module is used in an ungrounded ac control circuit. Input operation is unaffected by this connection. However, for ungrounded ac systems using ground fault detection circuitry, this connection balances the system and prevents erroneous ground fault indications.
| 621-1550 | |
|---|---|
| Point Inputs | 16 |
| Points Per Common | 16 |
| Nominal Voltage | 24 Vac/Vdc |
| Voltage Range | 18-28 Vac/Vdc |
| Current Range | 14-15 mA 10 mA at 24 Vac/Vdc typical |
| Switching Level Logic 1 Logic 2 | 18 Vac/ 19 Vdc 9 Vac/ 11 Vdc |
| Allowable Leakage Current | 1.3 mA ac 1.7 mA dc |
| Input Delay Off to On On to Off | 2.4 ms +- 20% 17 ms +- 20% |
| Operating Current +5 Vdc | 54 mA max. |
| Terminal Block Required | 621-9950 |