EWM Tetrix 351 AC/DC Synergic FW Operating Instructions Manual page 89

These accessory components can be retrofitted as an option > see 9 chapter.
Pin Signal
shape
A Output
Output
B
C Input
Input
D
(no c.)
E Input
+
R Output
F Output
G -
H Output
J
K Input
L Input
M Output
Output
N
P -
Output
S
T Output
U
V Output
099-000109-EW501
23.08.2018
Designation
PE Connection for cable screen
REGaus For servicing purposes only
SYN_E Synchronisation for master/slave operation
IGRO Current flows signal I>0 (maximum load 20mA
/ 15V)
0V = welding current flowing
Not/Aus Emergency stop for higher level shut-down of
the power source.
To use this function, jumper 1 must be unplugged on
PCB T320/1 in the welding machine. Contact open 
welding current off
0V Reference potential
NC Not assigned
Uist Actual welding voltage, measured on pin F, 0-
10V (0V = 0V, 10V = 100V)
Vschweiss Reserved for special purposes
SYN_A Synchronisation for master/slave operation
Str/Stp Start / stop welding current, same as torch
trigger.
Only available in non-latched operating mode. +15V =
start, 0V  stop
+15V Voltage supply
+15V, max. 75mA
-15V Voltage supply
-15V, max. 25mA
NC Not assigned
0V Reference potential
Iist Actual welding current, measured on pin F;
0-10V (0V = 0A, 10V = 1000A)
NC
SYN_A 0V Synchronisation for master/slave
operation
Design and function
Interfaces for automation
Diagram
89