GAI-Tronics 69255-001 User Manual

Pub. 42004-608L2B

GAI-TRONICS® CORPORATION

A HUBBELL COMPANY

69255-001

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Page/Party

Confidential ity Notice

This manual is provided solely as an operational, installation, and maintenance guide and contains
sensitive business and technical information that is confidential and proprietary to GAI-Tronics.
GAI-Tronics retains all intellectual property and other rights in or to the information contained herein,
and such information may only be used in connection with the operation of your GAI-Tronics product or
system. This manual may not be disclosed in any form, in whole or in part, directly or indirectly, to any
third party.

General Information

NOTE: If the 69255-001 Page/Party

GAI-Tronics Service Department must be contacted to modify the system configuration. If the PPI is
being used as a replacement part, proceed as described herein.

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Interface (PPI) is being added to an existing installed system, the

Interface PCBA

The 69255-001 Page/Party
Page/Party
PCBA is housed in a 10457 Series Card Rack with the MCU and other associated PCBAs. For each
Page/Party

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field equipment to the 69254 Series or 69440 Series Master Control Unit (MCU). The PPI

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zone or control area that exists in a system, one PPI is required.

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Interface (PPI) is a printed circuit board assembly (PCBA) used to interface

How to Use the Assembly

The 69255-001 PPI includes the following features and capabilities:

• Communication with external GAI-Tronics field devices via RS485 or FSK

• Provides page line switching to the backplane page resources

• Provides monitoring capability of the Party Line 1 to a local speaker

• Supports Party Line 1 and Party Line 2 on/off hook detection

• Provides ground fault detection on page line and the Party Line 1

• Provides for fail-safe path

• Self check path diagnostics

• The PPI provides two modes of operation:

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− Interfacing the MCU to the Page/Party

− Interfacing the MCU to the control area Page/Party

zones

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stations and external GAI-Tronics modules

GAI-Tronics Corporation 400 E. Wyomissing Ave. Mohnton, PA 19540 USA

610-777-1374  800-492-1212  Fax: [phone]

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ISIT WWW.GAI-TRONICS.COM FOR PRODUCT LITERATURE AND MANUALS

Pub. 42004-608L2B

69255-001 Page/Party

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Interface PCBA Page: 2 of 10

Functions of Mode One -- Zone Interface

• Performs audio switching to transmit from the 33-ohm page line to one of two 1000-ohm differential

backplane page resources

• Allows page line audio to drive a differential page monitor bus on the backplane

• Provides a 2400-baud FSK modem that operates over the 33-ohm page line

• Detects both Page line and Party line ground fault detection (less than 5000 ohms)

• Detects off hook conditions on both party lines (less than 120-ohms across L1 and L2)

• Allows party line switching from the 33-ohm party lines to the 33-ohm backplane

• Receives one external dry contact closure input

• Provides one output to drive an external relay for special applications

Functions of Mode Tw o - Control Area

Mode Two includes all of the functions of Mode One excluding FSK communication plus the following:

• Allows the Party Line 1 backplane resource to drive the 33-ohm page line in the control area

• Provides an RS-485 link to external GAI-Tronics modules

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69255-001 Page/Party

Interface PCBA Page: 3 of 10

Hardware Configuration

Pub. 42004-608L2B

Figure 1. 69255-001 PCBA

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69255-001 Page/Party

Interfaces

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Interface PCBA Page: 4 of 10

Pub. 42004-608L2B

Figure 2. 69255-001 Interfaces

All interfaces are provided through P2 on the 69255-001 PPI PCBA and include the following:

• Page Line

• Party Line 1

• Party Line

• Contact Closure

• RS-485 Line

• External Relay Control

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