Power Subsystem - Honeywell Vibrex 2000 User Manual

The detector picks up peak pulse levels as low as 0.5V. The
digital signal then goes to the microprocessor TPU for
calculating periods and phase references.
6.2.4
The Vibrex unit's power subsystem has the following
components:

Battery power

On-off logic

Power supply, 12 Vdc (including photocell power)

Power supply, 5 Vdc

Power supply, -12 Vdc

Short-circuit protection circuitry
6.2.4.1
The Vibrex unit operates with four D-size batteries, nominally
1.5 Vdc each. This setup provides an input range of 3.5 to 6.4
Vdc. The user can use rechargeable batteries, but they do not
provide so long an operating time nor the low-power warning
time that the recommended alkaline batteries are able to give.
The batteries are always powering a very low-power on-off logic
circuit. This circuit uses an input from the keyboard (
key) to turn on the main 12V supply. The off-current drain on
the batteries is less than 50 a. The microprocessor can switch
the on-off logic off (Auto-off feature) to save power.
For more information on using batteries with the Vibrex unit, see
Section 6.3.1 "Batteries and Replacement" .
Honeywell Confidential: Use or disclosure of information on this page is subject to the restrictions on the title page.

Power Subsystem

Battery Power
13841 Rev A
Chapter 6 – Maintenance
205
ON/OFF