Input Wiring - Distech Controls ECL-VAV Series Hardware Installation Manual

Input Wiring

Table 2 shows the available universal input (UIx) wiring methods.
Before connecting a sensor to the controller, refer to the installation guide of the equipment manufacturer.
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For a wire length less than 75' (23m), either a shielded or unshielded 18AWG wire may be used.
-
For a wire up to 200' (61m) long, a shielded 18AWG wire is recommended.
-
The shield of the wire should be grounded on the controller side only and the shield length should be kept as short as possible.
Table 2: Input Wiring
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Dry Contact input.
-
RTD input (for example, 1000Ω).
-
Thermistor Input (for example, 10kΩ type II and III).
-
Resistive input, maximum 350kΩ (for example, use with 10kΩ and 100kΩ potentiometers).
-
0 to 20mA input used with a 2-wire, 0 to 20mA sensor powered by the controller's internal
15VDC power supply.
-
0 to 20mA input used with a 2-wire, 0 to 20mA sensor powered by an external 24 AC/DC
power supply.
-
0 to 20mA input used with a 3-wire, 0 to 20mA sensor powered by an external 24 AC/DC
power supply.
-
0 to 20mA input used with a sensor powered by its own power source.
-
Voltage input used with a 3-wire 0 to 10VDC or 0 to 5VDC sensor powered by an external
24 AC/DC power supply.
-
Voltage input used with a 0 to 10VDC or 0 to 5VDC sensor powered by its own power
source.
Sensor Input Type Input Connection Diagram
UIx
Digital Dry Contact
NO-NC
COM
UIx
RTD/
Thermistor
COM
Potentiometer
UIx
10kΩ
COM
+15VDC
Sensor
+
UIx
0-20mA
–
COM
249Ω / ¼W
249Ω ¼W
UIx
0-20mA
-
Sensor
+
COM
24VDC
249Ω ¼W
UIx
+
0-20mA
Common
Sensor
COM
24VAC
AC
249Ω ¼W
UIx
0-20mA
+
Sensor
-
COM
UIx
+
0-10V
Common
Sensor
COM
24VAC
AC
UIx
0-10V
+
Sensor
-
COM
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