Current Output Units - Setra Systems 223 Operating Instructions Manual

See sections 3.3 and 3.4 for additional instructions for units with N1 output codes.
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3.2 Current output units

The Model 223 is a two-wire loop-powered 4 to 20 mA current output and unit and delivered
rated current into an external load of 0-800 ohms. The Model 223 is available with a multi-
conductor cable or various style connectors. Diagram 3 shows electrical connection wiring for
current output transducers.
Diagram 3: Connection table for voltage output transducers
Cable wire
Connection Wire
+Excitation Red
-Excitation Black
Case GND Shielding
Minimum supply voltage: 10 + 0.02 X loop resistance
Maximum supply voltage: 30 + 0.004 X loop resistance
The power supply must be a DC voltage source with a voltage range between 10 VDC and
30 VDC measured between the "+Excitation" and "-Excitation". The unit is calibrated at the
factory with a 24 VDC loop supply voltage and a 250 ohm load.
Current must flow in one direction only. Please observe polarity. See diagram 4.
The cable shield drain wire shall be connected to the earth ground to comply with EMC
requirements and electrical rejection.
NOTE: The transducer case and integral bayonet connector shell are electrically connected.
Diagram 4
Power
Bayonet
Pin
A
D&B
Shell
Setra
Transducer
+
+Excitation
+
_
4 PIN M12 15 PIN DSUB 9 PIN DUB
Pin Pin
1 7
3 5
Shell Shell
_
-Excitation
+
_
6
Pin
4
9
Shell
Load