BT REFLEX RR B Service Manual page 193

© BT Europe AB
Electrical system – 5000
Functional description
Valid from serial number
713962-
Order number
218920-040
21.4 Functional description
The electronic card has a microprocessor that monitors switch status,
control voltages, etc., and provides instructions for external electronics,
contactors, and valves, etc.
The module is equipped with an internal battery so that pre-set informa-
tion remains in the electronics module once battery power has been
switched off. Any errors registered by the micro-processor are shown
on the display. Error codes are explained in conjunction with the elec-
tronic card. The electronic card's inputs and outputs are marked with
connection numbers and can be easily connected and disconnected
using the connectors. The inputs and outputs, which have two fixed
positions, have LED indicators: green is used for inputs, red for out-
puts and yellow for others.
Designation
Designations for card inputs/out-
puts, in accordance with wiring
diagram.
21.4.1 Truck not started up
When the battery is connected to the truck via the charging plug, the
electronic card A5 receives +48 V voltage and the LEDs (shown in the
table) light up. LEDs 210, 211, 301 and 302 light depending on whether
the respective sensor has been activated or not. A voltage of +7.35 V
is supplied by A5 to potentiometer R1 in the speed control, the brake
control R2 and the hydraulic controls R11–R15.
Designation
STEER WHEEL ANGLE
HEIGHT COUNTER
+48 V
Service Manual
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Diode number
Diode name indicating the
card's active input/output
Diode number
210, 211
301, 302
805
STEER PWR
POWER OK
+48 V STEER
REFLEX RR B,E RR B,E CC
T-code
403-414, 669-671, 716-718
Date
2005-06-01
21- 35