Installation Instructions

Document No. 129-370
Installation Instructions
November 23, 2009
Installation
1. Remove the shroud from the mounting bracket
by squeezing the shroud and lifting it straight off
(conduit-mount only).
2. Mount the bracket to a wall, cabinet, etc. using
self-tapping screws (not provided). Anchors
may be required for concrete and cinder block
wall mounting.
3. Do one of the following:
• For conduit-mount installation: Attach the
conduit to the mounting bracket with a
coupling (not provided). Feed the field wiring
through the conduit to the sensor.
• For non-conduit-mount installation: Run the
field wiring to the sensor and provide strain
relief.
4. Connect the field wiring to the sensor terminals.
See Table 1 and Figure 1.
5. For conduit-mount installations, provide strain
relief by securing the wiring to the mounting
bracket and reinstall the shroud. See Figure 1.
Table 1. Wiring Connections (Voltage).
Sensor
Terminal
Connection
+EXC 24 Vac
COM Neutral
OUT 0 to 10 Vdc (Signal +)
COM Signal/Feedback Negative (-)
Page 2 of 3 Siemens Industry, Inc.
OUT
LOW
COM
-
EXC
+
+
+
ZS
NO
ADJUST
Range: 0-5" WC
Supply: 24 VAC
Output: 0-10 VDC
Date Code: xxxx
Options:
HIGH
590-501
HIGH PRESSURE PORT
LOW PRESSURE PORT
SPAN ADJUSTMENT
ZERO ADJUSTMENT
TRANSDUCER TERMINALS
SEN0338R1
Figure 1.
Voltage Output Units
The voltage output version has a three-wire circuit
with three wiring terminals (COM, OUT and EXC).
See Figure 1.
The Excitation and Output are commoned on the
circuit. The voltage output can operate from 9 to
30 Vdc or 12 to 30 Vac excitation, with 0 to 10 Vdc
output. See Figure 2.
Model
265
Power
Supply
Readout
or
DAS
- COM
OUT
+ EXC
SEN0447R1
+EXC Connected to the positive terminal of the power
supply.
-COM Connected as the reference for power supply and
output signal.
OUT Connected to the positive terminal of control or
pressure monitor.
Figure 2.
Current Output Units
The 4 to 20mA current output version is a two-wire
loop-powered unit. The current flows into + terminal
and returns back to the power supply through the -
terminal. The power supply must be a DC voltage
source with a voltage range between 9 and 30V
measured between the positive and negative
terminals. The unit is calibrated at the factory with a
24 Vdc loop supply voltage and a 250 ohm load.
See Figure 3.
SEN0448R1
265
9 to 30VDC
+
-
Current
Monitoring
Device
Figure 3.