CHAPTER 4: CONTROLS
MODEL HF2 2 kHz HIGH FREQUENCY RESISTANCE WELDING POWER SUPPLY
990-057
4-7
Opto Coupler Firing Switch - 3-Wire Connection
A SPDT opto coupler switch can be connected to
the Optical Firing Switch connector to eliminate the
use of Switch Debounce Time when welding at
rates of greater than 1.5 welds/second.
CONTROL SIGNALS Connector
1
A 15-pin, sub-miniature "D" Control
Signals Connector includes inputs for:
(a) Remotely selecting weld schedules 1
through 127; (b) Inhibiting the HF2
Weld Control from beginning a new
welding process; and (c) Invoking an
Emergency Stop Condition which
abruptly terminates the welding process.
The Control Signals inputs
Figure 4-7. Opto Coupler Firing Switch
and outputs are designed to be used
with a Programmable Logic Control
(PLC) (see Figure 4-8) or a Host
Computer in automated environments.
2
When an external chain control box is
connected to the Control Signals
Connector in place of a PLC, chained weld
schedules can be implemented semi-
automatically with an external chain
control box (see Figure 4-9).
3
The Control Signals Connector also
includes outputs for: a) One DC Solid
State Relay; and b) One AC Solid State
Figure 4-8. Control Signals Connection
Relay.
4
The 15 pin connector is a Viking
DMRST15RA05CG (Unitek P/N: 250-
1-195). The mating connector is a
TRW Cinch Connector comprised of a
DA-15P (Unitek P/N: 250-1-199) male
connector and a DE-51210-1 (Unitek
P/N: 250-1-200) plastic junction shell.
The mating connector is included in the
HF2 Weld Control Shipping Kit.
Figure 4-9. Remote Chain Control Box
Input/Output Signals
