D-2
Appendix D Automation
FAQ: 2000 SERIES AUTOMATION
D-2 011-003-991 EN Rev. Initial Release
A. We combined the alarm and advanced feature connector outputs from the 900 Series with 2000 Series
additions to provide maximum features and flexibility while retaining most feature backward compatibility.
Q. What do I do with the UNUSED PINS?
A. You should electrically isolate each unused pin so that shorts to ground and other outputs are avoided.
This could possibly damage the USER I/O board and other system components.
Q. Do I ground the shields on the START and USER I/O cables?
A. No; leave the shields from the cables isolated and cut-back so they do not
touch ground: this prevents
ground loop interference from occurring.
Q. Should I ground the RETURN lines in the START and USER I/O cables?
A. If required: this generally is not a problem. If problems occur, see “OTHER THAN
24 VOLTS”
Q. What are those SQUARE PLASTIC HOUSINGS on the cables?
A. They are ferrites that are used to reduce crosstalk and interference from entering the system. DO NOT
remove them.
Q. How LONG can I run the CABLES?
A. Cable sets are available in 8, 15, 25, and on special order 50-foot lengths. Contact Branson Product Sup-
port or Customer Service if you have special needs.
Q. Can I run the Branson welder cables in a WIRING TROUGH with other system cables?
A. Generally yes. But it would be best to avoid other noise trouble source cables or wiring.
Q. What other system cables might cause a NOISE TROUBLE SOURCE?
A. Avoid wiring of devices such as solenoids, large relays, motors, or anything that has the potential of large
inductive currents. Digital devices may also create broad-spectrum noise. Generally, all automation controls
can be noise generators.
Q. Why do you require the READY signal to be monitored by the system PLC?
A. The welder mandatory requirements dictate the unit be READY or else the unit will DISREGARD any
start command.
Q. Why can’t I use a SINGLE START input to signal the welder?
A. This is not preferable as you are running the signals in parallel, and cable capacitance can reduce the
noise immunity designed into the controls. The dual inputs are required for the use of manual start switches,
and the necessary circuit needs of an actuator welder utilizing solenoid valve control.
Q. Why must I MAINTAIN THE START SIGNAL?
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