22
SAM-1A
EN
II. Schematic diagram of how the safety system works
Safety
PLC
Output
IN 1
Power Control
INPUT (FPGA)
Power Control
(FPGA)
Power Stage
(FET, Relay, ...)
OUT 1
Safety
PLC
Input
I/O
I/O
POWER
Shutdown
Message (GIN)
I/O
GYS
III. Activating the ‘Safe Welding Off’ (SWO) function (Hard)
A switch (DIP 1), located on the SAM-1A board (see electronic board on page 11), is fitted to the equipment to
provide a robust safety feature. Simply switch both switches to ON.
1 2
ON
IV. SWO (Safe Welding Off) wiring and feedback
If switch 1 (DIP 1) is set to the ON position and switch 2 (DIP 1) to the OFF position, the safety device must be wired.
A dedicated terminal block (X5) is available on the SAM-1A circuit board (see circuit board on page 11).
Generator
SAM-1A
T2
AC
DC
Power
L
+ -
T1
+ -
A1
A2
K2
13
GIN
Uc
12
A1
A2 -
+
24V DC
X5
X1
Uc
A2 A1 S13 S14
1 2 3 4
DC
DC