Controller - Institute of Transportation Engineers

4.6.1.2
All external screws shall be countersunk and shall be Phillips flat head stainless steel
type.
4.6.1.3
The housing shall be treated with clear chromate and the slot designation labeled on the
back-plane mounting surface above the upper slot card guide.
4.6.1.4
The Chassis shall be cooled by convection only. The top and bottom pieces of the
housing shall be slotted for vertical ventilation.
4.6.2 Serial Motherboard
SERIAL MOTHERBOARD shall function as support for its connectors, A1 to A5 and
FP, and as the interface between the CPU and the dedicated modules/Front Panel carrying
both serial communications, logic, and power circuits. The PCB shall be multi-layered,
with one layer plane assigned to DC Ground.
4.6.2.1
A wiring harness PS2 shall be provided between the Type 2070-4 Power Supply and the
MOTHERBOARD PCB (provide strain relief). Test points shall be provided on the FPA
side of the MOTHERBOARD for PS2 lines.
4.6.2.2
A wiring harness FP shall be provided, linking the MOTHERBOARD with the FPA.
4.6.3 Type 2070-5 VME Cage Assembly
TYPE 2070-5 VME CAGE ASSEMBLY shall consist of 3U five slot/connector VME
Cage, Front Mounting Plate, and PS1 Harness. The VME Cage shall conform to VME
Standard IEEE P1014/D12 for 3U Cage. All slot/connectors shall be A24:D16 Interface.
4.6.4 Type 2070-1A CPU Main Controller Board
The Type 2070 – 1A CPU Main Controller Board shall either be affixed to the Transition
Board via at least four stand-off devices or mounted in a one slot VME board assembly
(removable). A PS1L Harness shall be supplied with one end mating to the PS1 power
supply connector and the other end mated to the MCB DIN Connector. The VME bus
lines shall be terminated by a 100-Ohm resistor per line.
Standard for the ATC – Type 2070 March 29, 2001
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