Specifications

Page 17–8
FOCUS System Manual
• The FOCUS Configuration Software (FCS)
has been installed on your computer (see
Chapter 3)
• Acceptance tests for the FOCUS chassis
and all previously installed equipment have
been done to rule out invalid test results for
this module
• FCS is up and running (see the FCS online
help facility: FOCUS Configuration
Software > Starting FCS)
17.3.1 Hardware Installation and
Connections
To install either a Pilot Wire Interface Module
and a two-terminal rear interface module or two
Pilot Wire Interface Modules and a three-
terminal rear interface module, complete the
following steps.
1. Bring the FOCUS chassis “on line”.
Click on the “Online” speed button
.
This uploads to the FCS the current status,
settings, operating statistics, etc., for the
FOCUS chassis — and the Pilot Wire
Interface Module.
2. Unlock the FOCUS chassis.
If the chassis is locked, execute the “Unlock
Configuration” command on the FCS Setup
menu or click on the “Unlock FOCUS
Chassis” speed button .
This puts the chassis — and the Pilot Wire
Interface Module — into a configurable state.
3. Insert the Pilot Wire Interface Module(s)
into the FOCUS chassis.
Locate two adjacent open slots on the FOCUS
chassis (to accommodate both the main and
auxiliary boards) for each module. Remember
that for a three-terminal application, you must
put the two modules next to each other, taking
up a total of four adjacent slots. Carefully
insert the Pilot Wire Interface Module into the
top and bottom grooves of the slot on the left
(of the two slots you have designated for the
module). The attached auxiliary board will
occupy the slot on the right. Slide it all the
way in until it is well seated in the slot. Lock
it into place using the black inject/eject lever
on the front of the module. If you are
installing a second module for a three-
terminal application, insert it in the same way
in the two adjacent slots you have designated.
When you first insert the module, the red/
green status LED is red. If the module is func-
tional, the status LED turns green within 20
seconds. If the module is non-functional, the
status LED stays red, even after 20 seconds
have elapsed.
4. Connect the proper relay wiring to the
module’s rear interface module.
The Pilot Wire Interface Module has four
types of rear interface modules, one for each
of the following types of application:
• An HCB/HCB-1 type relay for two-
terminal applications (see Figure 17-1)
• An HCB/HCB-1 type relay for three-
terminal applications (see Figure 17-3)
• An SPD type relay for two-terminal appli-
cations (see Figure 17-2)
• An SPD type relay for three-terminal appli-
cations (see Figure 17-4)
The only difference between the two “two-
terminal” rear interface modules and the two
“three-terminal” rear interface modules is that
the SPD versions have a transformer on them,
and the HCB/HCB-1 versions do not.
The terminal blocks on the two “two-
terminal” rear interface modules have
identical pin assignments, as do the two
“three-terminal” rear interface modules. All
four have compression-type terminal blocks
that easily accommodate up to 14 AWG
twisted pair. To connect a wire to any position
on any of the terminal blocks, turn the screw
counter-clockwise, slide the wire beneath the
spring, and then tighten the screw.
For a two-terminal application, connect the
wire from pin 19 on the HCB relay to connec-
tion P2-8 on the Pilot Wire Interface Module’s
rear interface module and the wire from pin