Installation
2.3
Inputs and outputs
The units have the following inputs and outputs:
WL-TX-900
WL-RX-900
Description
Input/output
2
Suitable for Voltage free contact,
NPN transistor, 0-5V signal.
Digital inputs
Relay outputs
3
250VAC 1A / 30VDC 1A.
2
2
Max 30VDC, 500 mA. Indicate
module status, communication failure
and local setpoint status.
Status outputs
1
4-20 mA with over-range and under-
range.
0-10 mA with over-range.
Analog inputs
+24V Loop
supply
1
Provides power for 1 external current
loop (up to 35 mA).
Analogue
setpoint
1
Allows discrete setpoint to be
controlled from analog input.
Threshold adjustable via rotary
switch.
Thermocouple
/ millivolt input
1
Provides measurement of E, J, K, T
type Thermocouple, millivolt signals
and user-defined thermocouple
types.
Thermocouple
setpoint
1
Lets you control discrete setpoint
from thermocouple with threshold
adjustable via rotary switch.
Pulse inputs
2
Up to 10Hz.
1
0-22 mA, suitable for loop powered,
floating input or single-ended input
device.
Analog output
20
