Setra System Model 224 - Manual (Page 3)

2.4 Venting
Model 224 transducers are vented through the electronics housing.
3.0 ELECTRICAL INSTALLATION
3.1 Voltage Output Units
The Model 224 voltage output transducer is supplied with a 6ft. multiconductor
cable, Bayonet style connector, Mini Din connector, or D-Sub style connectors.
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.
Diagram 1
Note: Model 224 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 224 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 224 is
available with 6ft. of multiconductor cable, Bayonet, Mini Din, or D-Sub style
connectors. 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.
Current must flow in one direction only - Please observe polarity. (See
Diagram 3.) We suggest that the cable shield Drain Wire be connected to the
system’s loop circuit ground for optimum electrical noise rejection. On transducers
with integral connectors (e.g., on Bayonet, D-sub, or MiniDin Connector types),
connection to transducer case ground can be achieved by connecting the cable
drain/shield wire to the mating cable-mounted connector shell (see Note 1).
Diagram 2
9 PIN 15 PIN 5 PIN
CABLE BAYONET D-SUB D-SUB MINI-DIN
CONNECTION WIRE PIN PIN PIN PIN
+ EXCITATION RED A 4 7 1
+ OUTPUT GREEN B 1 2 2
– OUTPUT WHITE C 8 12 4
– EXCITATION BLACK D 9 5 5
CASE GND DRAIN SHELL SHELL SHELL 3
CONNECTOR PIN WIRING FOR VOLTAGE TRANSDUCERS
CONNECTOR PIN WIRING FOR CURRENT TRANSMITTERS
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
Minimum Supply Voltage = 10 + 0.02 x Loop Resistance
Maximum Supply Voltage = 30 + 0.004 x Loop Resistance
9 PIN 15 PIN 5 PIN
CABLE BAYONET D-SUB D-SUB MINI-DIN
CONNECTION WIRE PIN PIN PIN PIN
+ EXCITATION RED A 4 7 1
– EXCITATION BLACK D & B 9 5 4
CASE GND DRAIN SHELL SHELL SHELL 3
3
and w/N1 option, see Notes 2 and 3, Page 4.) (