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Hardware Overview
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HARDWARE OVERVIEW
MODEL 640 ARCHITECTURE
The Model 640 consists of several circuit boards in a compact, computer-like chassis. The basic
unit is comprised of the main processor motherboard, a peripheral motherboard, a dual trunk
interface, a ROM disk board, and a RAM disk board. In addition to the standard boards, a TNPP,
TAP outdial, or dual serial board can be added for networking purposes. A second dual trunk
interface can be added, along with MF or dial click decoder options for the trunks. Each of the
standard and optional circuit boards are illustrated and described in the following subsections.
Figure 1 shows a top view photograph of the Model 640 with the top cover removed. The unit
shown has one optional board installed - a second dual trunk card.
Figure 1. Model 640 with Top Cover Removed
Figure 2 and Figure 3 are provided to help locate each of the main components of the Model 640.
Each item in the illustrations is labeled with a number for easy cross-reference from the text in
the following subsections (numbers in parenthesis). See Section 11 for more detailed schematics
and circuit board silkscreens.
Содержание 640 DAPT XTRA
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Страница 196: ...Parts Lists and Schematics 184 025 9416 Silkscreen...
Страница 197: ...Parts Lists and Schematics 025 9416 185 COMPONENT LOCATIONS Dual Dial Click 702 9119C Dual MF 702 9197D 1...
Страница 198: ...Parts Lists and Schematics 186 025 9416 RAM Disk 702 9386B ROM Disk 702 9389B...
Страница 199: ...Parts Lists and Schematics 025 9416 187 TNPP Interface 702 9362C 2...
Страница 200: ...Parts Lists and Schematics 188 025 9416 Terminal Block Adapter 702 9470B...
Страница 201: ...Parts Lists and Schematics 025 9416 189 CONFIGURATION DIAGRAMS Dual Trunk Telco DID 024 0076A...
Страница 202: ...Parts Lists and Schematics 190 025 9416 Dual Trunk Telco End to End 024 0077A...
Страница 203: ...Parts Lists and Schematics 025 9416 191 Dual Trunk Telco E M 024 0078A...
Страница 204: ...Parts Lists and Schematics 192 025 9416 Dual Trunk Telco Ground Start 024 0079A...
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