MSA Ultima X Series Instruction Manual

Electrical Connections for Ultima X Gas Monitors
"!
WARNING
Before wiring the Ultima X Series Gas Monitors, disconnect power source
supplying the monitor; otherwise, electrical shock could occur.
For Ultima XE and XIR installations, the internal grounding terminal
must be used for equipment grounding. The external grounding
terminal is only to be used as a supplemental bonding connection
where local authorities permit or require such a connection.
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 with 4 to 20 mA output
• Oxygen models with 4 to 20 mA output
• A three-wire connection is required for all:
• Combustible Gas models
• Toxic and Oxygen Models with 4 to 20 mA output, that are
to be operated in connection with accessory functions
(relays, etc.).
Wiring for all Models
Install wiring in accordance with the electrical code of the country
in use and UL 61010-A1 or CSA C22.2 No. 1010.1, as
applicable. In these installations, twisted-pair, instrument quality
cable is recommended. Shielded cable is recommended for cable
runs where interferences from radio frequency interference (RFI),
electromagnetic interference (EMI) or other noise sources exist
(such as motors, welding equipment, heaters, etc.).
NOTE: See Installation Outline Drawings for wiring details as
specified in Chapter 3, "Specifications".
Conduit may also be needed in areas where large amounts of
electrical noise is expected.
Use caution when selecting a cable size. The following tables
express the maximum cable length when only using the Ultima X
Series Gas Monitors. Ultima X Series options may take additional
power which requires a heavier cable or a short cable run.
When selecting cable size, consider future needs (i.e., addition of
sensors and/or options available with the Ultima X Series
Monitors). See Chapter 3, "Specifications" for proper input voltage.
Ensure that water and dirt are not able to enter the unit via the
wire or conduit. If the unit is installed in a location known to be
Chapter 1, Installation
1-6

MSA Ultima X Series Specifications

General

Brand	MSA
Model	Ultima X Series
Category	Measuring Instruments
Language	English