User`s manual

SIERRA VIDEO SYSTEMS
14
Control Panels
There are four male 3-pin connectors labeled "CTL PNL RS-485" (for Control Panel) on the back
of the processor frame. Each Sierra Video Systems control panel has two connectors. The
connectors are in parallel for daisy chaining multiple control panels.
If you make your own interconnect cables, Pin 2 is ground. Pin 1 and Pin 3 connect pin for pin.
The maximum control panel cable length is 5,000 feet (1,524 m) when operated at 31.25K baud.
See the Control Panel manual for detailed information about control panels.
GPI I/O
The 25 pin D connector on the rear of the Sequoia CPU frame provides relay contacts under
software control that can be used to indicate a failure of router frame power supplies and fans.
This document describes that functionality.
The female 25 pin D connector on the rear of the Sequoia CPU frame provides access to 5 relay
contact sets. Two of these contact sets are used to indicate failures in the router frames. Pins 8
and 7 will be connected to each other when any of the four router frame power supplies fail. A
light on the failed power supply will also extinguish to indicate the module to be replaced. Pins 1
and 2 will be connected to each other when any of the four router frame fans fail. A light on the
failed power supply module (which carries the failed fan) will also extinguish to indicate the
module to be replaced.
All relay contacts are floating relative to any ground in the router or CPU frame. No relay contact
should be more than 1500VRMS from CPU frame ground. Relay contact ratings are 0.5A @
125VAC, 2A @ 30VDC.
Pin # Connection
A
larm Description
1 GPI-4 out N/O *Factory Configurable
2 GPI-4 out Common
3 GPI-3 out N/C Failure- Fan Power Supply # 2
4 GPI-2 out N/O Failure- Fan Power Supply # 1
5 GPI-2 out Common
6 GPI-1 out N/C Not Used
7 GPI-0 out N/O Failure- Power Supply # 1
8 GPI-0 out Common
9 GPI-4 in *Factory Configurable
10 GPI-3 in *Factory Configurable
11 GPI-2 in *Factory Configurable
12 GPI-1 in *Factory Configurable
13 GPI-0 in Close All GPI- out Contacts
14 GPI-4 out N/C *Factory Configurable
15 GPI-3 out N/O Failure- Fan Power Supply # 2
16 GPI-3 out Common
17 GPI-2 out N/C Failure- Fan Power Supply # 1
18 GPI-1 out N/O Failure- Power Supply # 2
19 GPI-1 out Common
20 GPI-0 out N/C Failure- Power Supply # 1
21 GND Ground Connection for GPI in
22 GND Ground Connection for GPI in
23 GND Ground Connection for GPI in
24 GND Ground Connection for GPI in
25 GND Ground Connection for GPI in
* Contact the Sierra Video Systems factory for custom GPI configurations.