Specifications

Page 17–4
FOCUS System Manual
A simplified connection diagram for FOCUS and
an HCB or HCB-1 is shown in Figure 17-5, and
the diagram for FOCUS and an SPD is shown in
Figure 17-6.
Figure 17–5.
HCB/FOCUS Simplified Connections.
Figure 17–6.
SPD/FOCUS Simplified Connections.
17.2.3 Configuration Options
There are several software settings for the Pilot
Wire Interface Module as shown in Figures 17-7
& 17-8. These settings are for the direct transfer
trip portion of the system and for changing how
the pilot wire relay system responds to a loss of
channel on the FOCUS equipment.
You configure these settings for each module
using the FOCUS Configuration Software (FCS).
For configuration instructions, please refer to the
FCS online help facility (Configuring the FOCUS
Channel Modules > Current Differential
Interface Module (HCB/SPD)…). The FCS is
connected to the chassis via the Maintenance
Module’s RS-232 "craft interface" on the front of
the FOCUS chassis.
Using the FCS, you make all the configuration
settings for the module on one screen. The upper
right corner of the configuration window tells you
the module’s chassis slot number and, if the
module is using ROM version 20 or later, its ROM
version. It also tells you whether the module is
attached to a two- or three-terminal rear interface
module, and, if it is attached to a three-terminal
rear interface module, whether it is operating in
two- or three-terminal mode.
NOTE
It is extremely important to set the OC pickup
above maximum load if you chose to select any
of the OCT settings. This will void nuisance trips
for momentary losses of power or channel.
Figure 17–7. HCB Configuration Window for a
Module used in a Two-Terminal Application.