Miller Electric MR-5 - Manual (Page 18)

3. Remove welding power source interface side
panel.
4. Route remaining cord from computer interface
through strain relief in bottom of welding power
source interface, to 14-position terminal strip.
5. Connect leads as follows:
a. Red lead to terminal 52.
b. Blue lead to terminal 50.
c. White lead to terminal 35.
d. Green lead to terminal 36.
e. Long green lead with ring terminal connects
to chassis ground.
6. Reinstall and secure side panel.
2 -5. COMPUTER INTERFACE TERMINAL STRIP
CONNECTIONS
IMPORTANT: A 25 ft. (8m) interconnecting cable
with a five-pin Amphenol plug is supplied with this unit
but is not used in this installation. Retain cable for
future use.
WARNING: ELECTRIC SHOCK can kill.
• Do not touch live electrical parts.
• Shut down unit, welding powersource, and robot
and disconnect input power employing
“lockout/tagging procedures” before making in-
terconnections.
Lockout/tagging procedures consist of padlocking line
disconnect switch in open position, removing fuses
from fuse box, or shutting off and red-tagging circuit
breaker or other disconnecting device.
There are several terminal strips inside the computer in-
terface for control connections. Remove unit top cover,
loosen screws on strain relief on unit rear panel if
necessary, and locate appropriate terminal strip for con-
nection. Tighten screws on strain relief if necessary,
and reinstall top cover when procedure is finished.
A. ARC FAILURE Light Connections
The ARC FAILURE light on the computer interface front
panel is turned on and off by a signal from the robot
control unit. The robot control unit must supply 24 volts
dc to the computer interface arc failure circuit when arc
failure occurs. Locate supplied length of 18 gauge/2
conductor cord for this connection, and proceed as
follows:
1. Open robot control unit door, and locate jig ter-
minal strip 2.
2. Route cord under cross member below door.
3. Make cord connections to terminal strip com-
mon and the Weld Alarm terminal.
4. Close robot control unit door, and route cord
through strain relief on rear panel of computer in-
terface.
5. Connect cord common to 2TL and positive to
2TG.
B. CV/CC Connections
1. Locate terminal strip 2T.
2. For CC operation, remove jumper link between
terminals E and F on 2T.
IMPORTANT: The Inductance control is disabled
when operating in the CC (constant current) mode.
Ta-i 14 436
SECTION 3
-
FUNCTION OF CONTROLS
Arc Failure
indicator
Light
Figure 3
-
1. Front Panel View
OM-882 Page 5