Overview
Page 6
MDE-3116E Distribution Box PA0306 Installation Instructions · November 2015
Overview
Under no circumstances should a D-Box be used for normal operation with the cover
removed. The cover protects personnel and the environment from potential safety
hazards associated with electronic circuitry.
WARNING
When the D-Box is used at smaller sites (two-wire runs less than 100 feet with few
fueling positions), components on the boards may fail. Refer to
Transformer for Smaller Sites”
for modifications to rework the D-Box to avoid
this issue.
CAUTION
The D-Box provides an interface between Gilbarco consoles and controllers with Two-wire
Interface (TWI) current loop and dispensing units, and CRIND devices. The distribution
board(s) are fixed at 45 mA interface to the controller and are set standard at 45 mA output to
dispensing units or CRIND devices. Additional field jumper settings are provided to select
30 mA for other non-Gilbarco Underwriters Laboratories (UL)-listed dispensers.
Note: Interface cables between the D-Box and the console/controller are not included with the
D-Box, and must be ordered separately. Refer to
on
proper length and type of cable required. Two pieces each of these cables are supplied
with Passport systems.
The D-Box houses the power supply transformer and a removable tray with up to two Printed
Circuit Boards (PCB). Each PCB contains a power supply, an opto-coupled current loop
interface, eight dispenser current loops, and automatic isolation circuitry.
Two four-channel MTA connectors are provided for each circuit board for field wiring (see
on
The Passport Enhanced Dispenser Hub [EDH (PA0403 or PA0415)] requires this D-Box. For
wiring connections, see
on
.
There are eight individual current data loops for dispensing units on each distribution board.
The two boards installed in a D-Box can be configured as either of the following:
• Two separate inputs with each input controlling eight data loops.
• One input controlling 16 data loops.
