Carrier 19DV Series Installation, Operation And Maintenance Instructions page 56

power supply if total power consumes less than 40VA@20VAC. Others, power supply shall be provided by cus-
tomer fused transformer.
3. The discrete input loop is powered by internal 24VAC power supply. Field optional contactor or switch must can
withstand rated 24VAC voltage, maximal 60mA and rated 20 mA current.
4. The analog input support 5kΩ/10kΩ NTC thermistor, 0/4-20mA sensor and 5VDC sensor.
5. Each analog output loop support 0/4-2OMA 0/2-10 VDC voltage output. The analog output loop is powered by
board. Do not supply external power.
6. For standard discrete input (on 1/2/3/4 IOB), only when the contactor switch is closed, an alarm will be
generated.
7. SW2 configured by field, if 4-20 mA signal sensor, shall turn the switch to "ON" position.
8. For 4thIOBdiscrete input, only when the contactor or switch is open, an alarm will be generated.
9. All the plug in the IOB use wire of 0.75mm2.
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