APPENDIX B: WELD HEAD CONTROL INPUT/OUTPUT SIGNALS
SERIES 300 FAST RESPONSE WELD HEAD SYSTEM
B-4
990-115
Remote Schedule Selection
These signals allow schedule selection via a binary parallel interface. The controlling device — a PLC
or host computer, for example — should provide isolated dry relay contacts or open collectors from
opto-couplers to activate these signals.
Table B-1. CONTROL SIGNAL INPUT Connector Pin Assignments
Pin No.
Signal Name
Function
PARALLEL REMOTE SCHEDULE SELECTION INPUTS.
May be set up at any time
during operation. Next first-level foot switch contact closure selects the next schedule. All
lines have internal 1k ohm pull up to +5V and are active low. See figure B-3.
1 2
0
Binary remote schedule select bit 1 (input 1)
2 2
1
Binary remote schedule select bit 2 (input 2)
3 2
2
Binary remote schedule select bit 3 (input 4)
4 2
3
Binary remote schedule select bit 4 (input 8)
12 2
4
Binary remote schedule select bit 5 (input 16)
5 2
5
Binary remote schedule select bit 6 (input 32)
14 2
6
Binary remote schedule select bit 7 (input 64)
ISOLATED SOLID STATE RELAY CONTACT OUTPUTS
6
Relay K2 Output
+5-50 VDC (from user supplied power)
8
Relay K1 Output
5-35 VAC (from user supplied power)
13
Relay K2 Return
+5-50 VDC return
15
Relay K1 Return
5-35 VAC return
PROCESS STOP EXTERNAL INPUTS.
All lines have internal 10 k ohm pull up to +5V
and are active low.
9
Process Inhibit
Process stop input
10
Emergency
Shutdown
Emergency stop input
11
Circuit Ground
DC common
Summary of Contents for 300 Series
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