Siemens SITRANS AS100 Operating Instructions Manual page 12

Connecting
Extended Temperature Version (ET)
① Vsup: 20 to 30 V DC supply input
② Vsens: Analog output 0.08 to 10 V DC nominal
③ shield--tied to Sensor casing
*Sensor range selection
Note
• Connect shield to ground at one end only!
• If Sensor mounting is grounded, leave cable shield disconnected
• If Sensor mounting is not grounded, connect cable shield to ground
The longer the cable, the more susceptible it is to noise and earth loops. We recommended
using cable with heavy gauge conductors and good RF/electrical shielding (copper braid
rather than drain and foil). A proper junction box close to the sensor is an ideal location not
only to extend the cable, but to also to configure the wiring for high or low sensitivity range
operation.
This table provides a guideline for suitable wire gauges where distances are considerable.
Maximum distance between Sensor and supply (24V or Control Unit)
12
high sensitivity range = red and orange to Vsup +
low sensitivity range = red to Vsup + and orange to Vsup -
wire size
AWG mm
24 7 x 0.20
22 7 x 0.25
20 10 x 0.25
mm * meters
2
0.22 500
0.35 800
0.5 1200
Operating Instructions, 04/2021, A5E31952194-AC
distance
feet
1600
2600
3900
SITRANS AS100