LCR-II Product Manual > Appendices

This appendix provides a tabular description of the wiring connections made to each LCR-II terminal block. Refer to it for general troubleshooting, especially if wiring may have been inadvertently misrouted in the field.

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PRINTER CONNECTION (J1)
Terminal Pin	Signal	Wire Color Cable #81513	Route To
J1-30	GND	Black	Printer, Pin 7
29	CTS	Blue	Printer, Pin 20
28	RXD	Yellow	Printer, Pin 2
27	TXD	Orange	Printer, Pin 3
26	RTS	Brown	Printer, Pin 6

POWER CONNECTION (J6)
Terminal Pin	Signal	Wire Color	Route To
J6-13	Earth	Drain/Green Wire	No Connection
29	GND	Black	DC Ground
28	+12V in or 24V In	Red	+12VDC or +24VDC

The drain wire must be connected to Pin 13 of terminal J6 in the LCR-II. It must NOT be connected in the cab. Trim the drain wire from the cable end inside the cab.

The LCR-II Power cable kit includes a fuse holder and fuse to protect the system of a short circuit in the cable. Liquid Controls recommends that this fuse be used in all installations not having a fused accessory block to protect the truck in the event of cable faults.

TERMINAL CONNECTION RS-485 (J2)
Terminal Pin	Signal	Wire Color		Route To
Terminal Pin	Signal	Cable #81572	Cable #81513	Route To
J2-25	485-B	Black	Violet	Terminal
24	485+A	Red	Red	Terminal

Jumper J10 on LCR circuit board must be set for the RS-485 communication protocol.

FRONT COVER PUSH BUTTONS & INTERNAL PULSER CONNECTION (J8)
Terminal Pin	Signal	Wire Color Cable #81513	Route To
J8-38	GND	Black	Internal Pulser GND
37	GND	Black	Push Pulser GND
36	In 1	Violet	INCREASE Button
35	In 2	Gray	SELECT Button
34	In 3	Green	Internal Pulser "B"
33	In 4	White	Internal Pulser "A"
32	+5V OUT	Red	Internal Pulser "+"
31	+Vo

PRINTER CONNECTION (J1)
Terminal Pin	Signal	Wire Color Cable #81513	Route To
J1-51	GND	White	Ground, Pin 5
50	CTS	Green	RTS Terminal, Pin 4
49	RXD	Gray	TXD Terminal, Pin 3
48	TXD	Violet	TXD Terminal, Pin 2
47	RTS	*	CTS Terminal, Pin 8
46	+Vo	Red	Lap Pad, Pin 8

Jumper J10 on the LCR-II circuit board must be set for the RS-232 communication protocol.

* For a standard RS-232 terminal (other than the Lap Pad), the red wire is connected to J3-47.

LIQUID CONTROLS POD (J8)
Terminal Pin	Signal	Wire Color Cable #81513	Route To
J8-38
37	GND	Black	Pulser Signal GND
36
35
34	In 3	Green	Channel B Output
33	In 4	White	Channel A Output
32
31	+V0	Red	+V Input

SINGLE CHANNEL PULSER (J8)
Terminal Pin	Signal	Wire Color Cable #81513	Route To
J8-38
37	GND	N/A	Pulser Signal GND
36
35
34
33	In 4	N/A	Pulse Output
32
31	+V0	Red	+V Input

VALVE SOLENOID CONNECTION (J8)
Terminal Pin	Signal	Wire Color Cable #81513	Route To
J13-19	Earth	Green	Solenoid 2 Case Ground
18	Out 6	Black or Red	Solenoid 2
17	+Vo	Black or Red	Solenoid 2
16	Earth	Green	Solenoid 2 Case Ground
15	Out 7	Black or Red	Solenoid 1
14	+Vo	Black or Red	Solenoid 1

To operate a single channel pulser, a jumper is necessary between pins 2 and 3 on J4.

VEEDER ROOT SOLID STATE QUAD PULSER (J8)
Terminal Pin	Signal	Wire Color Cable #81513	Route To
J8-38
37	GND	Black	Pulser Signal GND
36
35
34	In 3	Orange	Channel B Output
33	In 4	Black	Channel A Output
32
31	+V0	Red	+V Input

It is necessary to connect pull-down resistors of 300 Ω between CHAN B and GND, and CHAN A and GND.

RTD TEMP. PROBE CONNECTION (J14)
Terminal Pin	Signal	Wire Color Cable #81513	Route To
J14-23	RTD-D	Red	RTD
22	RTD-S	Red	RTD
21	RTD+D	White	RTD
20	RTD+S	White	RTD

AUXILIARY OUTPUTS (J12)
Terminal Pin	Signal	Wire Color Cable #81513	Route To
J12-45	+Vo	N/A
44	Out 1 Aux. 2	N/A	Pump or Aux Control
43	Out 2 Aux. 2	N/A	Flow Direction
43	Out 3	N/A	Pulse Input for Aux System
41	GND	N/A
40	Out 4	N/A	Display Input
39	Out 5	N/A	Display Input

OPTICAL AIR ELIMINATOR (J15)
Terminal Pin	Signal	Wire Color Cable #81513	Route To
J15-56	+Vo	Red	Optical Sensor
55	In 5	White	Optical Sensor
54	GND	Black	Optical Sensor
53	Out 8	Black	Solenoid 3
52	+Vo	Red	Solenoid 3

Wiring Tables

Wiring Tables