Johnson Controls 231 Installation Guide

Model 231 Multi-Sense®

ISO

✓

Certified

9001: 2000

Wet-to-Wet Pressure Transducer

CECE

RoHS

SS231 Rev B 04/26/07

5.0 OPERATION

Range Selection Switch

Auto Zero Button

Electrical Output

Configurator

Contents

A B C D

RANGES

MS1 50 25 10 5 MS2 100 50 20 10 MS3 250 125 50 25

EXC.

4-20 MA

Electrical Connections

ZERO

ABCD

COMOUT

REMOTE ZERO

A B C D

OUTPUT

ABCD

4-20 0-5 0-10 1-5

Figure 6

BAR A.REV SLOW BI-DIR SWAP

PSI NORM FAST UNI-DIR NORM

Range Selection Switch: The unit is set to the highest range when calibrated at

the factory. To select the other ranges, slide the switch to the right.Important: Push “zero” button after installing the Model 231, and after changing range.

Auto Zero Button: Press and hold the “ZERO” push-butt on for 2 seconds to automatically reset zero or provide contact closure on “Remote Zero, see figure 4, pg. 8, and figure 5, pg. 9 .

Electrical Output: The unit is set at the factory to 4-20 mA. To select another output, move the slide switch to the right.

Electrical Connections: Electrical termination for power supply, 3-wire voltage output and 2-wire true 4-20 mA current output, and remote zero wiring.

BAR/PSI: Jumper selectable engineering units in Bar ranges or PSI. A. REV/NORM:

A.REV: Analog Reverse: When in reverse mode, the output increases when the

differential pessure decreases and decreases as pressure increases.

NORM: When in Normal mode output increases as pressure increases and

decreases as pressure decreases. SLOW/FAST: When Slow mode is selected, 5-second averaging is provided for

surge damping. BI-DIR/UNI-DIR: Select UNI-Directional or BI-Directional mode. Unidirectional mode measures from 0 to full scale differential pressure. Bidirectional mode measures pressure from minus 1/2 of full scale to plus 1/2 of

full scale differential pressure. Output will read 1/2 full scale when differential pressure is zero.

SWAP/NORM: Jumper selectable Port Swap feature eliminates costly replumbing when incorrectly installed or replaced. Go from NORMAL to SWAP and the jumper makes the “HI” Port “LO” and the “LO” port “HI.

1.0 GENERAL INFORMATION...................................................................... 4

2.0 MECHANICAL INSTALLATION ............................................................. 4

2.1 Media compatibility........................................................................ 4

2.2 Environment...................................................................................... 4

2.3 Pressure Fittings............................................................................... 5

2.4 Mounting............................................................................................ 5

2.5 Installation Procedures.................................................................. 5

3.0 OPTIONAL 3-VALVE MANIFOLD PROCEDURE............................... 6

4.0 ELECTRICAL INSTALLATION................................................................. 8

4.1 Electrical Termination

Wiring: 2-Wire , 4 to 20 mA and Remote Zero............................. 8

4.2 Electrical Termination

Wiring: 3-Wire, 0 to 5, 0 to 10, 1-5 VDC and Remote Zero........ 9

5.0 OPERATION..............................................................................................10

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