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Service Support Spirit
The socket which has 5 pin description:
Pin
Signal
Number
Content
3.1
+24V
The power source anole of proximity switch.
3.2
SIGNAL
The signal input terminal of proximity switch.
3.3
COM
The power source cathode of proximity switch
3.4, 3.5
Arc Start Port This is normally open contactor of relay. When CNC send arc
（ARCSTART_1, start commend, the contactor can close and plasma power
ARCSTART_2) source start make arc start work.
Arc start port use normally open contacts of relay: during arc start and torch are working,
relay contactor can keep close. It can keep open in other condition. The relay contactor capacity
is 10A/250VAC, if work voltage and work current of arc start control circuit are exceeded this
rated value, please use relay to augment capacity. Otherwise, system will not work steadily.
In side THC, A 200mA recoverable fuse is installed at the power supply of proximity switch,
to avoid damage of power when proximity switch failed.
The proximity switch of THC is NPN(or PNP) type open-drain proximity switch. User can set it
by the switch on voltage divide board. If the 2-bits switch is “ON”, user should use NPN proximity
switch. If the 2-bits switch is “OFF”, user should use PNP proximity switch. The default set of
the 2-bits switch is “ON”.
NOTICE: in the new version of hardware, the 2-bits switch is canceled. User can use NPN or
PNP type open-drain proximity switches directly only by changing the “L09” parameter if needed.
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