Liquid Controls Differential Pressure Transducer - Manual (Page 8)

8
electrIcal InstallatIon
electrical Installation
When ordered as part of a meter system with a LectroCount register, the ∆P transducer is wired to register at the
factory. The ∆P transducer can also be ordered separately and installed onto a meter system already in service.
Connecting the ∆P transducer to a LectroCount register requires the use of an additional board (PN 81944), which
mounts directly to the LectroCount register’s circuit board. The 81944 board is compatible with the 84040-4, 84040,
81920, 81547-1, and 81547-2 circuit boards, but main CPU boards must be loaded with the proper software. LCR-II
registers require version 4.04 or higher SR214 firmware and
ST250 or another compatible ticket software. LCR 600 registers
require SR601 firmware. The following wiring instructions apply
to all compatible circuit boards.
Disconnect the power before working on the CPU board.
Disconnect Power
Ensure that you are properly grounded before handling the
electronic printed circuit boards.
take Proper ESD Precautions
81944 Circuit Board
LectroCount CPU Board
To wire ∆P Transducer to a LectroCount register:
1. Unplug the J1, J2, and J3 terminal blocks from the
LectroCount register CPU board. Leave the wires in the
terminals.
2. Remove the screw at the top left corner of the
LectroCount register CPU board.
3. Plug the 81944 board into the J1 connectors on the
LectroCount register 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 LectroCount register CPU board
6. Plug terminal J16 into the 81944 board.
81944 Position
When removing the J1 or J16 terminal
from the 81944 board, hold down the right
end of the board to prevent flexing.
Be Careful with the CPu Board
When flashing the LectroCount register board, the
81944 board must be removed from terminal J1.
Don’t Flash with 81944 Connected