Setra-system Model 227 Manual de usuario descargar pdf (Pagina 2)

3.0 ELECTRICAL INSTALLATION

3.1 Voltage Output Units

The Model 227 voltage output transducer is supplied with a 6ft. multiconductor

cable, Bayonet style connector, or D-Sub style connectors. The voltage output

is either 5 VDC FSO or 10 VDC FSO. Diagram 2 shows electrical connection

wiring for voltage output transducers, and the excitation required.

3.2 Current Output Units

The Model 227 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 227 is

available with 6ft. of multiconductor cable, Bayonet style connector or D-Sub

style connectors. Diagram 3 shows electrical connection wiring for current

output transducers.

Note 1: The transducer case and integral connector Shell are electrically connected.

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.

9 PIN 15 PIN

CABLE BAYONET D-SUB D-SUB

CONNECTION WIRE PIN PIN PIN

+ EXCITATION RED A 4 7

+ OUTPUT GREEN B 1 2

– OUTPUT WHITE C 8 12

– EXCITATION BLACK D 9 5

CASE GND DRAIN SHELL SHELL SHELL

9 PIN 15 PIN

CABLE BAYONET D-SUB D-SUB

CONNECTION WIRE PIN PIN PIN

+ EXCITATION RED A 4 7

– EXCITATION BLACK D & B 9 5

CASE GND DRAIN SHELL SHELL SHELL

Diagram 2

CONNECTOR PIN WIRING FOR VOLTAGE TRANSDUCERS

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

Diagram 3

CONNECTOR PIN WIRING FOR CURRENT TRANSMITTERS

Minimum Supply Voltage = 10 + 0.02 x Loop Resistance

Maximum Supply Voltage = 30 + 0.004 x Loop Resistance

Note 1: Model 227 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.

2.4 Venting

Model 227 gauge or compound transducers are vented through the

electronics housing.

and

w/N1 option, see Notes 2 and 3.)

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1 2 3 4 5 6 7 8

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Setra-system Model 227 Manual de usuario Pagina 2

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