Data conections, Dms & lectrocount registers – Liquid Controls DMS Installation User Manual

Page 13

dMs & lectroCount registers

Connecting the DMS and a LectroCount register(s)

together for data communication requires some minor

rewiring on the LectroCount 81920 CPU board. Two

wires from the 40' data cable (PN 81513040) must be

moved to different terminals. The connector at the other

end of the data cable must be plugged into the specified

DMS port. The LectroCount 84040 CPU requires no

modification to communicate with the DMS.

The DMS provides female communication ports for three

LectroCount registers with 81513040 data cables.

daTa ConneCTIon To The dMs

Single Meter Systems

To install data communication for a single meter system,

plug the DB-25 connector of the LectroCount data cable

into the DMS port labeled “METER 1”.

Multiple Meter Systems

To install data communication for a multiple meter

systems, plug the DB-25 connector of each LectroCount

data cable into its respective DMS port: “METER 1”,

“METER 2”, or “METER 3”.

WIrInG leCTroCounT reGIsTers for dMs
CoMMunICaTIon

When connecting a DMS to a single or multiple meter

system with LectroCount registers with 81920 CPU

boards, they must be configured to communicate via

RS-485. LectroCount registers with 84040 CPU boards

do not require any configuration to communicate via RS-

485.

To configure LectroCount LCR-II registers to RS-

485:

1. Shut off power to the registers before moving any wires

or jumpers.

2. Open the register(s).
3. On terminal block J3, remove the red wire from pin 46

and the violet wire from pin 48.

4. On terminal block J2, attach the violet wire to pin 25 and

the red wire to pin 24.

5. Move the J10 jumper position from 232 to 485. Newer

registers may be labeled P, for RS-485, and T, for RS-

232.

daTa ConeCTIons

Electronic Register 1 Connection

Electronic Register 2 and 3 Connections

Data Cable 40’

PN 81513040

Data Cable 40’

PN 81513040

Data Cable 40’

PN 81513040

Do not apply power to the DMS Module until the LectroCount

Register has been rewired for RS-485 communication.

Before Powering Up the DMS

See page 14 for diagrams.