APPENDIX B: ELECTRICAL AND DATA CONNECTIONS
CD-A DUAL PULSE RESISTANCE WELDING POWER SUPPLY
B-2
990-430
Section II. External Input / Outputs
I/O Connector (D-Sub 37-pin)
The CD-A Power Supply user Input and Output control signals can
be found on the rear panel of the CD-A on the D-Sub 37-pin I/O
Connector labeled
CONTROL SIGNALS
. For added I/O flexibility,
the Input and Output 24VDC logic inputs can be configured for
either sink or source. The Inputs and Outputs are biased the same.
The Switch labeled
I/O
on the rear panel of the CD-A Power Supply
is used to set the biasing of the inputs to either Sink (
LOW = True
Inputs
) or Source (
HIGH = True Inputs
).
Signal Definitions
PIN
DESCRIPTION
1
+24VDC
The total current draw from pins 1 and 19 must not exceed 500 mA
2
Optical firing switch input
Caution:
When connecting to these I/O pins. Damage may result from an
improper connection. The optical firing switch input can only be used with
Amada Weld Tech heads that have this feature. In operation, an optical
switch connects between pin 2 and pin 20 to initiate firing. Neither of these
pins should be used for any other purpose since they connect to internal,
non-isolated points in the unit.
3
Not used
4
Firing switch input
Input must be held active for at least 50ms
5
FS1 (Foot switch level 1) input
Input must be held active for at least 50ms
6
Not used
7
Weld inhibit input
Weld function is inhibited as long as this input is held active
8
Weld counter reset input
Input must be held active for at least 50ms
9
Program lock input
Programming function is inhibited as long as this input is held active
10
Binary schedule select bit 1
Schedule 1 can be selected by activating this input for 50ms. Must be held
active to combine other schedule inputs.
11
Binary schedule select bit 4
Schedule 4 can be selected by activating this input for 50ms. Must be held
active to combine other schedule inputs.
BIAS SWITCH
