The Digital Input Expander allows 4 volt free inputs to be monitored by a single analogue input channel. The resultant analogue value can be decoded by the A to D function module in an BMS controller to produce internal digital status bits for alarm monitoring or other status input applications.
Supply Voltage: | 24Vdc or ac ±
15% |
Supply Current: | 50mA max. (I
mode) 30mA max. (V
mode) |
Input Channels: | 4-volt free
contact switch 24Vdc |
Input Threshold: | Upper 17.5V
max (ON) level Lower 7.5V
min (OFF) level |
Distance: | Max. distance
of IOD4 from controller 25m (V mode) 1000m (I
mode). |
Output: | Mode
selectable by link header current/voltage (I/V). |
I: | 0 to 20mA,
max. resistance of load 250Ω. |
V: | 0 to 10Vdc,
max. current 1mA. |
LED: | Single LED
per input channel, LED on indicates contact closed. |
Ambient limits: | Storage: -10℃
(14 °F) to +70℃(158 °F) Operating:
-10℃
to +50℃ Humidity: 0 to 90%RH non- condensing |