Setra 209s Operating Manual
Installation Guide
Setra Systems Model 209
Pressure Transducer
1.0 GENERAL INFORMATION
Every Model 209 has been tested and calibrated before shipment.
Setra Systems 209 pressure transducers sense gauge pressure and convert this
pressure difference to a proportional high level analog output. Three standard
output and excitation versions are offered:
Excitation Output
9 to 28 VDC 4 to 20 mA - (Must Observe Polarity)
9 to 30 VDC 0.5 to 5.5 VDC - (Reverse excitation protection)
4.9 to 8.1 VDC 0.5 to 4.5 VDC - (No reverse wire protection)
2.0 MECHANICAL INSTALLATION
2.1 Media Compatibility
Model 209 transducers are designed to be used with any gases or liquids
compatible with 17-4 PH Stainless Steel.
2.2 Environment
The operating temperature limits of the 209 are -40° to +185°F (-40 to +85°C).
The compensated temperature range is -4 to +176°F (-20 to +80°C).
2.3 Pressure Fittings
Typically, standard pipe fittings and procedures should be used. However, for
pressure ranges in excess of 500 psig, we suggest the use of a sealant such as
Loctite Hydraulic Sealant. Excessive torquing of metal fittings may cause a
slight zero shift. The use of plastic fittings typically results in no noticeable zero
shift. Torquing does not appreciably affect linearity or sensitivity.
2.4 Tube Stub Welding Instructions
Standard welding practices should be followed. Caution must be taken to
protect the sensor against current paths that could damage the circuit board.
Apply a heat sink between the weld zone and the sensor that is large enough
to protect the sensor from overheating. Failure to use a heat sink may damage
the housing seal or circuit board.
2.5 Venting
Because the reference pressure in a sealed gage transducer will vary due to
changes in temperature and will affect overall accuracy (especially in units of
less than 500 psig range), all 209 Series transducers are available as vented or
sealed to atmosphere.
Vented units are ordered as PSIG range units. Sealed units are ordered as PSIS
range units. The 209 PSIG transducers are vented through the cable.
Hirschmann PSIG transducers are vented through the connector. Packard
PSIG units are vented through a porous filter plug supplied on the unit.
3.0 ELECTRICAL INSTALLATION
The Model 209 is available in four electrical terminations:
2 foot Cable Hirschmann Connector
Packard Connector Conduit Adapter, 1/2 inch
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:
Red + Excitation
Shield
Green
+ Out
+Out Green
-Out White
White
- Out
Black - Excitation
+
Monitor or
Control
Device
_
CAUTION: Unit is reverse excitation protected. However, do not apply power
to output lead as this could cause permanent damage.
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:
Model 209
Setra Transducer
(4-20 mA)
+
Red
+
Power
Supply
__
The 209 has a 2-wire cable, where red is positive and black is negative.
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.
_
Black
+
Load
(Monitor)
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:
2
Voltage Output
3
Pin # Function
1+ Excitation
3+ Output (connect to controls or monitor)
1
2Common (connect to return of power supply)
(connect to appropriate power supply)
Current Output
Pin # Function
1Positive
2Negative
Top View: Hirschmann Connector
Typ e: G4A1M#931807-106
Voltage Output
B
Pin # Function
B+ Excitation (connect to appropriate power supply)
A
C+ Output (connect to controls or monitor)
ACommon (connect to return of power supply)
Current Output
Pin # Function
BPositive
ANegative
C
Top View: 3-Pin Packard Connector
2
Typ e: P2S Series 150
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