Ensemble Designs 7465 Sync Changeover Switch - Manual (Page 10)

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Page 10
7465 Sync Changeover Switch and 9465 3G Sync Changeover Switch
Installation
Plug the 7465 or 9465 module into any one of the slots in the 1RU or 3RU frame and install the plastic
overlay provided onto the corresponding group of rear BNC connectors associated with the module
location. Note that the plastic overlay has an optional adhesive backing for securing it to the frame.
Use of the adhesive backing is only necessary if you would like the location to be permanent and is not
recommended if you need to change module locations. This module may be hot-swapped (inserted or
removed) without powering down or disturbing performance of the other modules in the system.
Cabling
Refer to the 1RU and 3RU backplane diagrams of the module on the following page for cabling
instructions. Note that unless stated otherwise, the 1RU cabling explanations are identical to those
given in the 3RU diagram.
Status and Alarm Cabling
In addition to full monitoring and access through the control system, the module provides contact
closure status indications through the 15-pin D Control connector on the corresponding rear slot
of the frame. These connections can drive an alarm system or other external monitoring devices
including LEDs. Two override GPI Inputs can also be accessed through the connector. Pinouts for the
status monitoring are given in the illustration on the next page.
Form C relay contacts provide both NO (Normally Open) and NC (Normally Closed) switching to
indicate fault status of the Primary and Secondary inputs and the protection switch output. Both
the NO and NC contacts are simultaneously available on the Control connector. Each output is
independently strappable to provide Ground, current-limited +5V (1k Ω resistor), or a Common which
appears on the D connector.
The three relay contacts provide the following status reporting:
• Primary Good or Failed – indicates Primary input status as Good when NO contact is active
(switched to Common).
• Secondary Good or Failed – indicates Secondary input status as Good when NO contact is
active (switched to Common).
• Switch Position – indicates the position of the protect switch as either Primary or Secondary
selected. The normal position corresponds to the Primary feeding the output.
An individual common is provided to each of the relays. For each of the three status relays there is a
3-position jumper on the module which configures the common signal that will be used by that relay.
The choices are as follows:
• COM – uses the user-provided common signal from the Control connector.
• +5 – provides a +5V signal through a 1k Ω resistor to the relay common.
• Gnd – uses ground as the relay common.