Binary Outputs; Analog Outputs; To Wire Inputs And Outputs - Carrier RTU Open v5 Installation And Startup Manual

Installing the RTU Open

Binary outputs

The RTU Open has 8 binary outputs. You can connect each output to a maximum of 24 Vac/Vdc. Each output is a
dry contact rated at 3 A, 24 V maximum, and is normally open.
To size output wiring, consider the following:
•
Total loop distance from the power supply to the controller, and then to the controlled device
NOTE Include the total distance of actual wire. For 2-conductor wires, this is twice the cable length.
•
Acceptable voltage drop in the wire from the controller to the controlled device
•
Resistance (Ohms) of the chosen wire gauge
•
Maximum current (Amps) the controlled device requires to operate

Analog outputs

The RTU Open has 2 analog outputs that support voltage or current devices.
AO-1 - 2-10 Vdc or 4-20 mA (Configure on jumper J3)
AO-2 - 0-10 Vdc or 2-10 Vdc
NOTE The controlled device must share the same ground as the controller. When used as a 4-20 mA output, the
load must have an input impedance of 500 Ohms or less. If the output is used as a voltage type output, then the
load impedance must be 10K ohms or greater.

To wire inputs and outputs

1
Turn off the RTU Open's power.
2
Connect the input wiring to the screw terminals on the RTU Open.
3
Turn on the RTU Open's power.
4
Set the appropriate jumpers on the RTU Open.
J3
W1
W2
W3
W4
W5
RTU Open v5
Installation and Start-up Guide
AO - 1
Battery Jumper
Format Jumper*
Input 11 mA Jumper
Input 11 Thermistor
Input 10 mA Jumper
0 - 10 Vdc/4-20 mA
In (Do not remove)
Out
Out (mA not used on this channel)
In (default position)
Out (mA not used on this channel)
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