GAI-Tronics 12593-001 Redundant PPI Switching Module - Manual (Page 2)

Pub. 42004-411A
Model 12593-001 Redundant PPI Switching Module Page: 2 of 6
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05/08
Hardware Configuration
The Model 12593-001 Redundant PPI Switching Module is comprised of two printed circuit board
assemblies (PCBAs). The lower base board contains the lower switching relays and measures 7.5 L
× 4
W inches (190.5
× 102 mm). The relay switching PCBA is equipped with seven small DPDT relays, two
LEDs, three 25-pin “D” connectors and four modular (plug-in type) terminal blocks.
The upper CPU PCBA employs a micro-controller and has two address switches (S1 and S2). The small
terminal block located on the opposite side is for external power when used in other applications when
power is not available via the 34-pin DIP connector (J1).
Installation
CAUTION
When installing or replacing this module, be sure power is not applied to
avoid damage to the module circuits.
The Model 12593-001 Redundant PPI Switching Module is designed for mounting in 4-inch Snap Trak
®
.
When inserting the module in SnapTrak
®
, exercise care when pressing the module edges into the
SnapTrak
®
to avoid damage to the module’s printed circuit board and components.
Once installed in the SnapTrak
®
, be sure the module edges are secured in the channels so that the module
does not dislodge during transport or operation if subjected to vibration. Also, if this module is used with
other modules in the SnapTrak
®
, be sure to leave spacing between modules to facilitate wiring at any
edge-mounted terminal blocks.
Terminations
The Model 12593-001 Redundant PPI Switching Module is equipped with three 25-pin “D” connectors,
and four modular (plug-in type) terminal blocks, which simplify external connections during installation,
and provide quick disconnect if replacement is ever required.
The following is a breakdown of each connector and terminal block and its function(s):
J1 – is the primary PPI card connection; a cable with a 25-pin “D-Sub” connector is required.
J2 – is the secondary PPI card connection; a cable with a 25-pin “D-Sub” connector is required.
J3 – is the output connection to the Page/Party ® TVP connection module; a cable with a 25-pin “D-Sub”
connector is required.
JTB1 – is the form “C” dry contact output, which can be used to activate additional switching modules,
or for remote status indication. The maximum switching capacity for the contact is 30 V dc @ 1 amp.
JTB2 – is a feed-through 12 V dc power output to additional switching modules.
JTB3 – is the 12 V dc power input to the module.
JTB4 – are the control inputs to the module to activate the relays to switch between primary and
secondary PPI cards, when a fault occurs. Activation at either input requires dc ground control.
The following is a summary of each connector and terminal block function(s):