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28.5 VDC Ground Power Unit
Models:
11A6647-1000/1010
11B6647-1000/1010
11C6647-1000/1010
11D6647-1000/1010
11A6647C1000/1010
11B6647C1000/1010
11C6647C1000/1010
11D6647C1000/1010
11A6655-1000/1020
11B6655-1000/1020
11C6655-1000/1020
11A6655C1000/1020
11B6655C1000/1020
11C6655C1000/1020
11D6655C1000/1020
11A6665-1000/1010
11B6665-1000/1010
11C6665-1000/1010
11A6666-1000
11B6666-1000
11C6666-1000
12/2006 - Rev. 04
- 50 -
8.0 ADDITIONAL INFORMATION
8.1
LED FUNCTIONS & ARRANGEMENTS
As described in Section 3, the system control is completely digital. System control software is comprised
of measurements, evaluation of measurements, threshold control, and a programmable logic control
(PLC) known as the User Program. The individual parts are fully integrated to operate together as a
software control system. The most important function is that of the User Program. The PLC has digital
inputs and outputs which converts the information coming from the hardware into a form recognizable by
the User Program software. Each input and output is monitored by an LED, and all inputs and outputs,
which are used, are shown on the control diagrams. Checking the status of these LED’s is a quick and
easy way of establishing the operational status of the converter, and is useful during fault-finding. An
illuminated LED indicates a high potential (+24V) at the hardware digital input or output. If the LED is off,
then the potential is low (0V).
The table below gives the names, labels and meanings of all the input and output LED’s used on the
Controller Board. The drawing of the table shows the arrangement of the LED’s on the board.
LED No.
Input/Output
Name
Function
H1red
out 20
Bsl_mode
Internal Switch S1 on
H2gn
nc
nc
H3gn
Rstout_n
No reset
H4
out 21
nc
nc
H5 gn
out 17
LED_mains
Parallel to Input-LED
H5 red
out 18
LED_mains
Parallel to Input-LED
H6 gn
5Vpwr_ok
Internal 5V voltage ok
H7
in 17
diag
Failure xout1 – xout4
H8
in 6
nc
nc
H9
in 5
nc
nc
H10
in 4
S3_1
Current selector switch bit 1
H11
in 1
K1_i
Contactor K1 is on
H12
in 2
nc
nc
H13
in 3
S3_0
Current selector switch bit 0
H14
in 12
nc
nc
H15
in 11
nc
nc
H16
in 10
nc
nc
H17
in 7
nc
nc
H18
in 8
nc
nc
H19
in 9
nc
nc
H20
in 15
Xzkr_r
firing board power ok
H21
in 16
Xzkr_p
firing board power on
H22
out 27
flashflag
Flashes if program is running
H23
in 13
nc
nc
H24
in 14
nc
nc
H25
in 19
epo_n
No “emergency-off“ (no converter locked)
H26
out 6
nc
nc
H27
out 5
nc
nc
H28
out 4
nc
Nc
H29
out 3
nc
nc
Содержание 11A6647-1000
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