OptiFlex™ I/O Expanders (part
no. FIO)
Automated Logic Proprietary and Confidential A Carrier Company. © 2022 Carrier.
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13
To address the FIO expander
You must give the FIO expander an address that is unique among the controller's expanders.
1 Turn off the power switch on the controller that the FIO expander is attached to.
2 Set the FIO expander's address (1 to 9) on the rotary switch. For example, the switch below shows
an address of 1.
3 Turn on the controller's power switch. The controller reads the FIO expander's address each time
you turn on the controller's power.
NOTE If the controller that this expander is attached to also has MEx expanders, the MEx addresses
should be from 1 to 6, and the FIO expanders use any of the remaining unused addresses. For
example, if the controller has 4 MEx expanders and 5 FIO expanders, the MEx expanders will use
addresses from 1 to 4, and the FIO expanders will use 5 to 9.
Wiring inputs and outputs
Inputs
The FIO expander has inputs that accept the following signal types.
Thermistor
1
• Precon Type 2 (10kOhm at 77 °F)
• Precon Type 3 (10kOhm at 77 °F)
• Carrier YSI 5kOhm at 77 °F
• TS-5700-850 10kOhm w/ 11kOhm shunt (5238 ohm@77°F)
Input voltages should be from 0.09 Vdc to 4.36 Vdc for thermistors.
Dry contact The maximum current when the contact is closed is 0.5 mA. The input voltage
should be 4.5V when the contact is open. Maximum closed contact resistance is
1kOhms.
0–5 Vdc
0–10 Vdc
The input impedance of the FIO expander is approximately 221 kOhm when
configured as a voltage input.
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