Setra System Model 223 - Manual (Page 3)

When installing units with Face Seal Fittings:
a) Align piping system to transducer connections
b) Hand tighten nuts
c)
Torque nuts by placing wrenches on nuts only (or on nut and wrench flats
of transducer body for units with fixed male face seals) Never hold the
unit by the electronics housing during installation.
2.4 Venting
Model 223 transducers are vented through the electronics housing.
3.0 ELECTRICAL INSTALLATION
3.1 Voltage Output Units
The Model 223 voltage output transducer is supplied with a 6ft. multiconductor
cable or Bayonet style connector. The voltage output is either 5 VDC FSO or
10 VDC FSO. Diagram 1 shows electrical connection wiring for voltage
output transducers, and the excitation required.
Note: Model 223 can be wired as a 3-wire device by connecting
– OUTPUT and –EXCITATION and drain wire to a common ground.
However, accuracy may be reduced due to increase in resistance.
3.2 Current Output Units
The Model 223 is a two-wire loop-powered 4 to 20mA current output unit and
delivers rated current into any external load of 0-800 ohms. The Model 223 is
available with 6ft. of multiconductor cable or Bayonet style connector. Diagram
2 shows electrical connection wiring for current output transducers.
The power supply must be a DC voltage source with a voltage range between
10 VDC and 30 VDC measured between the + and - terminals. The unit is
calibrated at the factory with a 24 VDC loop supply voltage and a 250 ohm load.
Diagram 2
CONNECTOR PIN WIRING FOR CURRENT OUTPUT TRANSDUCERS
Diagram 1
3
and w/N1 option, see Notes 2 and 3.) (
CONNECTOR PIN WIRING FOR VOLTAGE OUTPUT TRANSDUCERS
CABLE BAYONET
CONNECTION WIRE PIN
+ EXCITATION RED A
+ OUTPUT GREEN B
– OUTPUT WHITE C
– EXCITATION BLACK D
CASE GND DRAIN SHELL
EXCITATION: 10-30 VDC FOR 0.2 TO 5.2 VDC and 0 to 5 VDC
13-30 VDC FOR 0.2 TO 10.2 VDC and 0 to 10 VDC
CABLE BAYONET
CONNECTION WIRE PIN
+ EXCITATION RED A
– EXCITATION BLACK D&B
CASE GND DRAIN SHELL
Minimum Supply Voltage = 10 + 0.02 x Loop Resistance