Amada 1-288-01, Руководство по эксплуатации, Страница: 108 / 144

APPENDIX B: ELECTRICAL AND DATA CONNECTIONS
HF28 DC RESISTANCE WELDING SYSTEM
B-6 990-372
Force Firing Switch Cable Input
Function
The force-firing switch input to the Control from the weld head signals that the selected pressure has
been applied to the weld pieces. Note that a mechanical firing switch is subject to contact bounce,
which can cause false weld starts. The effects of switch bounce can be avoided at low weld speeds by
using the switch debounce function on the Control main menu. If welding speeds are to exceed 1.5
welds per second, use an optical firing switch.
Connections
The firing switch cable is 5 feet long, Type 2/C, 600-volt cable containing two shielded, twisted pair 22
AWG stranded leads.
The firing switch cable connector is a 2-pin Amphenol Type 80-MC2FI. It mates with the weld head
firing switch connector, which is a 2-Pin Amphenol Type 80-MC2M.
Firing Switch Connector
Pin Description
1 24COM
2
FIRE_1
Operator Emergency Stop Cable Switch Input
Function
You must connect a normally closed, single-pole switch across both cable leads, otherwise the Control
cannot be turned ON. Use the switch during Control operation as an emergency stop switch. When
operated (opened), it will immediately halt the weld process.
NOTE: You must press the
RUN
key on the front panel to reset the Control following an emergency
stop operation.
Connections
Connect an approved, normally closed emergency stop switch across the 2-foot (61 cm) operator
emergency stop switch cable. When the switch is operated (opened), it de-energizes the main power
contactor, removing three-phase input power to the Control.