Electrical Connections
for Ultima X Gas Monitors
Before wiring the Ultima X Series Gas Monitors, disconnect
power source supplying the monitor; otherwise, electrical
shock or ignition of hazardous atmospheres could occur.
For Ultima XE and XIR installations, the internal grounding
terminal (located on the interior bottom of the Ultima XE
main enclosure) must be used for equipment grounding. The
external grounding terminal is only to be used as a supple-
mental bonding connection where local authorities permit or
require such a connection. See FIGURE 1-9 for location of
grounding terminals.
.
NOTE: For Ultima X Series units with internal relays, see Appendix A.
This assembly is marked to identify power, ground and signal
connections.
• A two-wire connection is possible for certain:
• Toxic Gas models
• Oxygen models
• A three-wire connection is required for all:
• Combustible Gas models
• Toxic and Oxygen models with internal relays.
Figure 1-9. Ultima XE Grounding Terminals
"
WARNING
1-9
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