Owner's manual

ADS Environmental Services ADS Spider User Manual
Page 27
2. “ANALOG” type accepts an analog voltage from 0 – 2.5V.
The following diagrams show wiring details for most common
sensor types.
(i) 2-WIRE 0 - 20 mA and 4 – 20 mA current loop sensors
require an external 120-Ohm, ¼ W resistor (supplied):
(ii) 4-WIRE 0 - 20 mA and 4 – 20 mA current loop sensors
require an external 120-Ohm, ¼ W resistor
(iii) Voltage inputs may require up to two external resistors:
Sensor
+
+
-
-
Power
Supply
+
-
Spider system ground
Spider
IN X
120-Ohm ¼ W
Resistor
+
-
Sensor
+
-
Spider system ground
Spider
IN X
Ry
Rx
Sensor
+
+
-
Power
Supply
+
-
Spider system ground
Spider IN X
120-Ohm ¼ W
Resistor
+
-