Connecting Auxiliary Inputs (Optional) - GE Moisture Image 1 Series Service Manual

June 2003
Connecting Auxiliary
Inputs (Optional)
1-16
The Series 1 accepts up to two auxiliary inputs (optional) for each
channel from any probe with a 0/4-20 mA or 0-2 VDC output,
including a variety of process control instruments available from GE
Panametrics. Inputs may be self- or loop-powered. Self-powered
inputs are either current or voltage. Loop-powered inputs are usually
current. In either case, after you make connections to the electronics
unit, you must set the switch block on each channel card for current or
voltage depending on the type of input you are using. Use the
instructions that follow to connect and set up the auxiliary inputs.
Use Figure 1-12 as a guide for making auxiliary input connections for
the desired channel(s) to the terminal block labeled AUX on the back
of the electronics unit.
1 or 2
+24
1 or 2
To AUX
Terminal
RTN
Block
1 or 2
RTN
Figure 1-12: Auxiliary Input Connections
4 to 20 mA
4-20 mA
-
Transmitter
+
(Loop-Powered)
4 to 20 mA
4-20 mA
+
Transmitter
-
(Self-Powered)
+
Voltage
Output
-
Signal
Installing Optional Features