ADS Environmental Services Spider QR 775010 A0 - Manual (Page 29)

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
+
-