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Input Wiring
Before connecting a sensor to the controller, refer to the installation guide of the equipment manufacturer.
£ 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 shield length should be kept as short as possible.
Input can be connected as follows. Table 1 shows the input designation for the ECx-400 UUKL I/O Extension Module.
Sensor Input Type Input Des-
ignation
Input Connection Diagram
£ Dry Contact input.
£ Pulsed input
UIx
UIx
COM
To Digital
Input
Digital Dry Contact
NO-NC
£ RTD input (for example, 1000Ω).
£ Thermistor Input (for example, 10kΩ type II and III).
UIx
UIx
COM
To Analog-
To-Digital
Converter
RTD/
Thermistor
£ Resistive input, (for example, use with 10kΩ and 100kΩ potentiome-
ters).
UIx
UIx
COM
To Analog-
To-Digital
Converter
Potentiometer
10kΩ
£ 0 to 20mA input used with a 2-wire, 0 to 20mA sensor powered by the
ECx-400 UUKL internal 15VDC power supply.
UIx
+
-
Sensor
0-20mA
Controller
0-20mA Input
Equivalent
Circuit
UIx
COM
To Analog-
To-Digital
Converter
249Ω
Jumper
Setting
0-10V
0-20mA
+15VDC
£ 0 to 20mA input used with a 2-wire, 0 to 20mA sensor powered by an
external 24VDC power supply.
UIx
-
+
Sensor
0-20mA
Controller
0-20mA Input
Equivalent
Circuit
UIx
COM
To Analog-
To-Digital
Converter
249Ω
Jumper
Setting
0-10V
0-20mA
24VDC
£ 0 to 20mA input used with a 3-wire, 0 to 20mA sensor powered by an
external 24VAC power supply.
UIx
AC
+
Common
Sensor
0-20mA
Controller
0-20mA Input
Equivalent
Circuit
UIx
COM
To Analog-
To-Digital
Converter
249Ω
Jumper
Setting
0-10V
0-20mA
24VAC
£ 0 to 20mA input used with a sensor powered by its own power source.
UIx
+
-
Sensor
0-20mA
Controller
0-20mA Input
Equivalent
Circuit
UIx
COM
To Analog-
To-Digital
Converter
249Ω
Jumper
Setting
0-10V
0-20mA
£ Voltage input used with a 3-wire 0 to 10VDC or 0 to 5VDC sensor
powered by an external 24VAC power supply
UIx
AC
+
Common
0-10V
Sensor
UIx
COM
To Analog-
To-Digital
Converter
24VAC
£ Voltage input used with a 0 to 10VDC or 0 to 5VDC sensor powered
by its own power source.
UIx
+
-
0-10V
Sensor
UIx
COM
To Analog-
To-Digital
Converter
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