Miller Electric MR-5 - Manual (Page 4)

B. ARC FAILURE Light Connections (Figure 2-4)
A WARNING: Read and follow safety Information at beginning of Section 2-5 before proceeding.
The ARC FAILURE lightorlthe computerinterface front panel is turnedon and off by a signalfromthe robot control unit.
Locate supplied length of 18 gauge/2-conductor cord for this connection, and proceed as follows:
1. For robot control units with no other connections at jig terminal strip 2:
a. Open robot control unit door, and locate jig terminal strip 2.
b.
Route cord under cross member below door.
c. Make cord connections to terminal strip common and the Weld Alarm terminal.
d. Close robot control unit door, and route cord through strain relief on rear panel of computer interface.
e. Connect cord to 2TF and 2TG.
2. For robot control Units when 115 or 24 vac, or 24 vdc is used at jig terminal strip 2T:
a. Obtain a 115 or 24 vac, or 24 Vdc isolation relay, and install into jig interface.
b. Open robot control unit door, and locate jig terminal strip 2.
c. Route customer supplied 18 gauge/2-conductor cord under cross member below door.
d. Make cord connections to terminal strip common and the Weld Alarm terminal.
e. Close robot control unit door, and route cord to jig interface.
f. Connect cord to isolation relay coil and voltage source.
g. Cut off terminals from one end of supplied 18 gauge/2-conductor cord, and install terminals to connect to
contacts on isolation relay.
h. Connect one end of cord to a set of normally-open contacts on isolation relay.
i.
Route cord through strain relief on rear panel of computer interface.
j. Connect cord to 2TF and 2TG.
OM-882 Page 2