Chapter 3 — Theory of Operation
CV30 Fixed Mount Computer Service Manual 45
Design Description
The CV30 computer was designed to maximize data integrity in a mobile
environment, regardless of external user control.
The detailed descriptions of the block design are separated into power
block, battery charging, system function, audio system, and
communication system.
Power Source
There are three available power supply categories: an AC/DC supply, a dual
output and a wide range DC/DC supply, and a power supply compatible
with the existing 2455 supplies (using a converter cable).
• AC/DC supply
• Part number: 851-082-004
• Input 100-240 VAC, 47-63 Hz, 1 A,
• Output +12 VDC +/- 5% @ 4.15 A
• Dual Output DC/DC supply
• Part Number: 851-070-003
• Input 6-60 VDC, 14 A,
• Output 1: +12 VDC, 4.5 A (Logic power)
• Output 2: +12 VDC, 4 A (Heater power)
• Requires output Y cable (M2F 1400A)
• Wide Range Input DC/DC supply
• Input 6-96 VDC, 5.5 A
• Output: +12 VDC +/- 5%, 4.5 A
• Requires output cable (M2A F1100+ vehicle noise filter)
• 2455 DC/DC supplies
• Part Number 851-040-001
• Input: 10-36 VDC, 10 A
• Output: +12 VDC +/- 10%, 4.5 A
• Requires output cable (M2A F1100+ vehicle noise filter)
The CV30 main input connector from the external supply is a rugged,
Singatron 5-pin connector. Input power to the CV30 is separated into
logic power and heater power. Input voltage is +12 VDC +/- 4 VDC for
logic power and +12 VDC +/- 25% for heater power. Both power inputs
are accommodated through one connector. However, the heater power is
only available with the dual output DC/DC power supply.
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