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DI Input Control
(1) Connect the COM port to –VDC. The COM port cannot be connected to +VDC. The
acceptable voltage is DC5V~DC24V.
(2) 8 DI controls share the same power supply which accepts different levels of voltage starting
from DC5V to DC24V.
(3) IOB-0805 provides 5VDC for DI input control when the power supply is 110/220 VAC.
No extra DC power supply is necessary.
(4) When 5 relay output controls are in long-term use, an extra 5VDC power supply is necessary.
(5) Please DO NOT turn on the AC power supply while the DC +5V is in use.
Application Example: Alarm Detection (Contact Input)
IOB-0805 provides 5VDC for DI input control when the power supply is 110/220 VAC.
No extra DC power supply is necessary.
IOB-0805 DI Wiring Example A: Fire Alarm Detection (Contact Input) Using AC Power
Supply
166
Appendix
Fire Alarm Detector
(Contact Input)
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