GAI-Tronics 69255-001 User Manual
Pub. 42004-608L2B
GAI-TRONICS® CORPORATION
A HUBBELL COMPANY
69255-001
®
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: 610-796-5954
V
ISIT WWW.GAI-TRONICS.COM FOR PRODUCT LITERATURE AND MANUALS
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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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