Dispenser Peripherals Interface; Connectors - Bennett CNG Series Electronic Service Manual

Dispenser Peripherals Interface -

The Communication Hub Board on the wall of the dispenser and the
Communication Hub Board on the Card cage of the Sled (Closest to
the power distribution board) both communicate to the dispenser's pe-
ripherals.
This Communication Hub Board is used to process information from
different peripherals in the dispenser to the CPU Board. There will be
six plugs used on this board.

Connectors -

TS1, TS2 or TS6 -
/ RS-485 Peripherals. The Meter's Remote Core sends pressure signals, pulser signals, and tempera-
ture signals to the CPU Board. It doesn't matter which connector is used, they will all work in the same
way (see figure 9.4).
Pin 1 - 24 VDC
Pin 2 - Ground Return
Pin 3 - Data + (RS-485)
Pin 4 - Data - (RS-485)
TS4 - is used to read the temperature of the CNG Prod-
uct. This is a four wire connection that goes directly to the
RTD (see figure 9.4).
Pin 1 - Excitation +
Pin 2 - Sense +
Pin 3 - Sense -
Pin 4 - Excitation -
TS5 - is used to read the Pressure of the LNG Prod-
uct. This is a three wire connection that goes directly to
the Pressure Transmitter (see figure 9.4).
Pin 1 - Current Loop +
Pin 2 - No Connection
Pin 3 - Current Loop -
Communication Hub Board
53
Comm. Hub Board
Figure 9.3 - Peripheral Interface
TS1
TS5
TS4
TS2
TS6
Figure 9.4 - Connectors
125870 Rev A 8-12-14
CPU Board