Union Switch & Signal GENISYS II, Hardware Installation

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GENISYS II System Hardware Installation UNION SWITCH & SIGNAL
SM-6900B Rev. 0.0 August 1999 2-1
2. CARDFILE AND CIRCUIT BOARD INSTALLATION
2.1 INSTALLING THE CARDFILE
2.1.1 Mounting and Environment
The GENISYS II cardfile may be mounted in a standard 19-inch equipment rack, or on a wall or
shelf using the fiberglass mounting brackets supplied with the unit.* Keep the cardfile away from
sources of excessive heat or battery vapors. Positive ventilation is not required. Cardfile operating
temperature limits are -40
o
to +70
o
C. Cardfile mounting dimensions (including rear connectors)
are shown in Figure 2-1.
* The fiberglass mounting bracket should be used to isolate the cardfile from earth ground.
19.25”
3”
3”
3”
11.5”
12.19”
9.5”
Fiberglass Mounting Brackets
PCB Interface Connector Housing
F
IGURE
2-1. C
ARDFILE
I
NSTALLATION
D
IMENSIONS
2.1.2 General Wiring Practices
GENISYS II installations that are wired in the field should be configured to minimize cross talk
between wires. “Dirty” wiring (connections to external equipment) should be separated as much
as possible from wires carrying electronic data signals. Cables and wires in general should be
kept as short as possible to minimize induced line noise. (The input and output wires should be
twisted in pairs.) Case/house wiring layouts should also be arranged to minimize noise. Switch
heater wire runs, track leads, switch machine power wiring and any other “noisy” wiring should