Gasboy Gilbarco Interface Unit - Manual (Page 38)

30 Hardware Gilbarco Interface Unit v2.1
Gasboy CFN Series
AC power inlet and fuse
The interface unit has the same power requirements as the Site Controller, as given in the Site
Controller (I or II, as appropriate) installation manual.
Jumpers
The CPU board (part number C04835) has jumpers and switches that must be set correctly. Some
settings never change. The ones that do may also be discussed in chapter two of this manual. The
jumper positions labeled K1 through K8 are below:
Jumpers K5 and K6 are normally present but not installed when the unit is shipped. They must be
installed by the startup technician. Make sure the jumpers are set as shown here. The interface
will seem to work well even though some of these jumpers are set wrong, until you get a
momentary power failure. Transaction data can be lost and pumps can go out of service for
extended periods.
DIP switches
There are 24 DIP switches in the front right hand corner of the interface unit CPU board. When a
switch is closed, it grounds the logic signal, which is then read as a 0. When the switch is open,
the logic signal goes to +5 volts or logic 1. The normal setting of the switches is:
DIP switch bank 2, positions 1-8: all closed
DIP switch bank 3, positions 1-8: all open
DIP switch bank 4, positions 1-8: all open
Unless there is a specific reason, the switches should be set as described above. The individual
switches and their settings are described below.
DIP switch bank 2
DIP switch bank 2, position sets PCU poll address and allows clearing memory.
CPU Board Jumpers K1 to K8
Jumper Function and/or normal setting
K1 All K1 jumpers are absent.
K2 All K2 jumpers are absent.
K3 Position 1. Enables the dead man timer. K3-1 jumper must be
installed. K3-1 is the pair of K3 terminals closest to P9, the
long double-row offboard connector at the edge of the board.
Position 2. K3-2 jumper is absent. K3-2 is the pair of K3 ter-
minals farthest from P9.
K4 K4 does not exist.
K5, K6 Provide battery backup power to the devices in U31 and U32
respectively. K5 and K6 jumpers must be installed.
K7 Enables the AC power fail circuit. K7 jumper must be
installed.
K8 K8 jumper is absent.