beautypg.com

Differential pressure (∆p) transducer, Differential pressure (∆p) transducer installation, Be careful with the cpu board – Liquid Controls LCR 600 Install User Manual

Page 25

background image

25

DifferentiAl Pressure (∆P) trAnsDuCer

11

12

13

PRINTER

SERIAL 485

TERMINAL

POWER

COUNTER

MH1

CTS RXD TXD RTS

GND

GND

485+A

485-B

CTS RXD TXD RTS +VP

EART

H

GN

D

GN

D

IN

1

IN

2

IN

3

IN

4

+5V OU

T

+V

P

GN

D

+12-24

V

MH4

J20

J6

J3

J2

J1

J7

J7

C2

24

25

∆P Transducer

+5V(Out)/Jumper (59 to 32)

A/Blue (58)

+5V/Red (59)

B/Yellow (57)

GND/White (51)

+VP/Black (46)

B

The shutdown device should

draw no more than 1A.

When removing the J1

or J16 terminal from

the 81944 board, hold

down the right end of

the main CPU board to

prevent flexing.

Be Careful with the

CPU Board

Differential Pressure (∆P)

Transducer Installation

When ordered as part of a meter system with a LCR

600, Liquid Control’s ∆P transducer is wired to the

LCR 600 at the factory. The ∆P transducer can also be

ordered separately and installed onto a meter system

already in service. Refer to the ∆P transducer manual for

complete installation instructions. Instructions for wiring

the ∆P transducer to the LCR 600 are provided on this

page. The ∆P Transducer requires an additional board

(PN 81944) that mounts directly to the LCR 600 CPU

board. Typically, a ∆P transducer operates in conjunction

with a shutdown device, such as a valve or a dead-man.

The shutdown control must also be wired to the LCR 600

and should draw no more than 1 A.

to wire ∆P transducer to the lCr 600:

1. Unplug the J1, J2, and J3 terminal blocks from the LCR

600 CPU board. Leave the wires in the terminals.

2. Remove the screw at the top left corner of the LCR 600

CPU board.

3. Plug the 81944 board into the J1 connectors on the LCR

600 CPU board.

4. Fasten the top left side of both boards to the housing with

the screw provided wtih the 81944 board.

5. Plug terminal block J1 into the 81944 board. Plug J2 and

J3 back into the LCR 600 CPU board

6. Plug terminal J16 into the 81944 board.
7. Route the ∆P transducer cable through a cable gland in a

port on the back of the LCR 600. Secure the cable gland.

LC recommends running the cable through a cut to length

piece of weatherproof conduit.

8. Connect the four ∆P transducer wires to terminal block J3

on the LCR 600 CPU board and J16 on the 81944 board.

• Black to J3 terminal 46

• White to J3 terminal 51

• Yellow to J16 terminal 57

• Blue to J16 terminal 58

• Red to J16 terminal 59

9. Run the red jumper wire (provided with the ∆P transducer

kit) from the J8 terminal 32 to J16 terminal 59 (+5V).

10. Route two wires (AWG determined by device) cable from

the shutdown control device through a cable gland in a

port on the back of the LCR 600. Secure the cable gland.

LC recommends running the cable through weatherproof

conduit.

11. Connect the two wires from the shutdown control device

to terminal block J13,

• J13 terminal 14 is the +12VDC output

• J13 terminal 15 is the switching output