EFJohnson VR-CM50 manual Location of the Central PROCES- SOR Package CPP, CPU Cabinet Hardware

CENTRAL PROCESSOR PACKAGE INSTALLATION

SECTION 2 CENTRAL PROCESSOR PACKAGE INSTALLATION

2.1LOCATION OF THE CENTRAL PROCES- SOR PACKAGE (CPP)

In selecting a location for the Central Processor Package (CPP) equipment cabinet, the following crite- ria should be considered:

1.Avoid locations which are subject to high ambient temperatures, excessive moisture, flooding, exces- sive dust or infestation by insects or small animals.

2.The cabinet must be placed in an indoor location having a floor area large enough to allow access to both the front and rear of the cabinet. The minimum cabinet size is 21" wide by 26" deep. In addition, wall space will be required for the common ground bracket, surge arrestor box(es) and any additional RTL punch block(s).

3.A single, 120 VAC, 15/20 amp dedicated branch cir- cuit is required for CPPs of 60 card capacity or less. Two such branch circuits are required for packages equipped with 60 to 120 cards. Systems ordered with options TDM-OP200/E, /GB, /I and /NZ require 230 VAC circuits. If the building is equipped with an emergency generator, the CPP branch circuits should be part of the emergency power system.

4.An earth ground bond must be provided. A contin- uous copper cold water pipe or driven copper ground rod are suitable grounds. Electrical conduit, steam lines, sprinkler system lines, utility mains or building steel may not be used as ground bonds. Note: Verify the ground integrity yourself. It is risky to blindly trust grounds used by others.

5.The cable run to any console location may not exceed 4000 feet, using E.F. Johnson-provided cable. If the console is located in a different build- ing or if the cable route places its proximity to other electrical lines that can induce interference, the use of a Remote Interface Adapter (RIA) is required.

6.In placement of the cabinet, the front door of the enclosure must be readily accessible for service.

7.A connection to an outside telephone line is required for diagnostic modem access. If a dedicated modem line cannot be provided, an administrative line or a phone patch line can be used by routing the line through the modem. Programming the modem to auto-answer after several rings, will allow the line to be used for normal voice operation as well as CPP diagnostics.

8.Mounting space will be required for the system diagnostic printer (TDM-OP205). If the CPP is housed in a 60" cabinet, the printer can be placed on top of the CPP. If the CPP is housed in a 88" cabi- net, a shelf must be provided for the printer. The printer is supplied with a table-top stand which pro- vides paper supply storage and an output tray. Do not attempt to mount the printer inside the CPP cab- inet.

2.2ASSEMBLY OF THE CENTRAL PROCES- SOR PACKAGE (CPP) CABINETRY

If the CPP is housed in a single cabinet (30 cards or less in a 60" cabinet, 60 cards or less in a 88" cabi- net), no field assembly is required. If the CPP requires two or more cabinets, each cabinet section will be shipped separately to facilitate handling. Assembly of the cabinets is illustrated below in Fig- ure 2-1.Be sure to install all of the required hard- ware; do not omit any bolts or lockwashers.

The hardware in Table 2-1is included in Assem- bly A2809201 for joining 2 - 60" CPU Cabinets and Assembly A2809301 for joining 2 - 88" CPU Cabi- nets:

Table 2-1 CPU CABINET HARDWARE

Qty.	Part No.	Description
Joining 2 - 60" CPU Cabinets
6	28011H0B2012	1/4"-20 Hex Bolt
6	280211082041	1/4"-20 Keps Nut
2	240B25312420	2.5" Bushing Snap Ring
Joining 2 - 88" CPU Cabinets
8	28011H0B2012	1/4"-20 Hex Bolt
8	280211082041	1/4"-20 Keps Nut
2	240B25312420	2.5" Bushing Snap Ring

	February 1996
2-1	Part No. 004-3039-274