Setra System Model 209 - Manual (Page 2)

2
3.2 Current Output Units
The Model 209 (current output) transducer is a true 2-wire, 4-20 mA current
output device and delivers rated current into any external load of 0-800 ohms.
The 4-20 mA units are designed to have current flow in one direction only -
PLEASE OBSERVE POLARITY. We suggest that the electrical cable shield be
connected to the system’s loop circuit ground to improve electrical noise
rejection. The electrical connection is as follows:
Red + Excitation
Black - Excitation
+
Monitor or
Control
Device
_
Green
+ Out
White
- Out
Shield
3.3 Hirschmann or Packard Connectors - Voltage and Current Output
If the unit is provided with a Hirschmann or a Packard Connector, pin number
designations are as follows:
3.1 Voltage Output Units
The Model 209 voltage output is a 3-wire circuit. If the 209 is supplied with 2 feet of
cable, the electrical connection is as follows:
-Out White
+Out Green
Top View: 3-Pin Packard Connector
Type: P2S Series 150
Voltage Output
Pin # Function
1 + Excitation (connect to appropriate power supply)
3 + Output (connect to controls or monitor)
2 Common (connect to return of power supply)
2
3
1
Top View: Hirschmann Connector
Type: G4A1M#931807-106
Pin # Function
1 Positive
2 Negative
Current Output
Voltage Output
Pin # Function
B + Excitation (connect to appropriate power supply)
C + Output (connect to controls or monitor)
A Common (connect to return of power supply)
A
B
C
Pin # Function
B Positive
A Negative
Current Output
The 209 has a 2-wire cable, where red is positive and black is negative.
Model 209
Setra Transducer
(4-20 mA)
Power
Supply
Load
(Monitor)
+
+ +
_
_ _
Red Black
CAUTION: Unit is reverse excitation protected. However, do not apply power
to output lead as this could cause permanent damage.
CAUTION: Reverse excitation will not cause damage to the unit unless voltage
applied is above 50 VDC. However, the unit will not function if reverse wired.