SCR CONTROL BOARD
GSCB6
Block diagram
2 x 12 V
AC
Voltage
Supervisor
Phase
Loss
RESET
220 V
AC
Phase
Loss
Logic
Local
Supply
Synchro
Unit
Main
Supply
7
To auxiliary
firing board
Sync
V
RS
,
V
ST
,
V
TR
3
3
DSP
12
Output
Logic
6
6
6
Digital Input Unit
Inhibit 1
Inhibit 2
V/I Control
Encoder
4
Input
Logic
Encoder
Interface
6
Output Buffer
Pulse
Transformer
To
SCRs
2
5
MAX
MIN
RS232
Serial
Interface
RS485
T
START
T
STOP
CAN
3
V
COM
, I
REF
, V
REF
I
DC
, V
DC
5
Amplifier
Lowpass filter
Analog Input
Unit
To
Communication
2
Board
5
I
DC
From mains
current
transformers
3
Amplifier
Lowpass filter
+
-
Protection
Unit
I
MAX
/
V
MAX
Adjust
Unit
SCR FIRING
BOARD
Blocks description
Unit
Synchro
Digital Input
Analog Input
Protection
Description
Provides opto insulated signal for mains
synchronisation
Defines control variable (V or I), acquires
inhibit signals, provides encoder input
Provides fitered input for reference and
feedback signals
Generates overcurrent fault signal.
Current trip adjustable by means of a
trimmer.
Configuration of maximum and minimum
delay angle, start and stop time,
manual adjusting of output voltage (current)
Gate pulses generation and shaping
Adjust
Output buffer
Document GSCB6T002
GPSEMI [ GREEN POWER SOLUTIONS SRL ]
