
PA0338X00X D-Box Installation
Installation Overview
Page 18
MDE-4318D Competitive Pump and CRIND (CPC) Hardware/Software Start-up and Service Manual · May 2010
Boards (T20488 and T19547)
The D-Box houses one transformer and a removable tray with two Printed Circuit Boards
(PCBs) (T19547-G1 and T20488-G2). Each PCB contains an on-board power supply, an
optically-coupled current loop interface, and an automatic isolation circuitry between output
loops.
The T20488-G2 Board provides four 4-channel (totally 16 channels) MTA connectors for field
wiring. The four MTA connectors on this board are capable of driving 16 Wayne RS-485
CATs.
Note: Refer to FE-346 Field Wiring Diagram-Wayne CPC for a diagram of these connections.
Ensure that each distribution board is dedicated for use with 34 mA Wayne UL-listed
CATs or dispensers.
D-Box Board (T20488)
Figure 2-2: D-Box Board (T20488)
To the CAT
Field Wiring
Any unused
loop must be
cut and capped