Chapter 1 - General Information
1.6.3 Physical Configurations
The unit may be provided with all components housed in either one or two
rack-mounted chassises as shown in Figure 1.2.
A single-chassis configuration is used in most systems. Using the single-
chassis requires that all electrical control cables extend from the pedestal into
the control room and be connected directly to the 3860.
Two-chassis configurations are used in large pedestal systems where it is
possible to mount a rack-mounted chassis within the base extension. The
two-chassis configuration greatly reduces the length and number of
electrical control cables from the pedestal into the control room by placing
the functional modules that interface to the pedestal within the pedestal
equipment. The second chassis provides the operator controls and indicators.
The two chassises are functionally connected by a full-duplex fiber optic link.
The operator interface components include the keypad, display screen,
position knobs, and power switch on the front panel. The unit chassis is 5.25
inches high and can be mounted in a standard, 19-inch-wide equipment rack.
All of the Series 3860 Digital Controller's printed wiring boards provide
direct cabling access through integral connector plates on the unit's rear
panel. A fan in the rear panel provides cooling for the enclosure.
3862 Autotrack Controller
1-4
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