Safety Function
16 ULTIMA X5000 Gas Monitor Safety Manual
US
7. Safety Function
The ULTIMA X5000 sensor head, utilizes oxygen, combustible and toxic sensors to monitor and alarm to
dangerous and explosive atmospheres.
The element safety functions of the ULTIMA X5000 are defined as follows:
To provide the host system with a predefined 4-20 mA alarm signal output and to de-energize* a relay
(if included) in the event of a dangerous or explosive atmosphere depending on the sensor type
configuration.
*NOTE: The low and high alarm relays must be configured to de-energize to trip for proper SIL function. See
the user manual 10177361 for additional information.
See Table 3 for 4-20 mA alarm signal details in different operation modes.
The analog output range is 0-22 mA. It is normal operation within minimum to maximum detection range is
4 mA to 20 mA respectively. Refer to Table 3 for more detail on specific analog output conditions.
It is recommended to use password protection to prevent unauthorized users from changing configurations.
NOTE: The analog indications below 4 mA are configurable by the user in the range (0-3.75 mA). Refer to
operating manual for specific configuration details.
Table 4 Fault Reporting Time (Refer to Appendix A)
Fault Minimum time Maximum time
Integrated circuit memory 0.050 seconds 24 hours
Sensor w/o Swap Delay 3 seconds 4 seconds
Sensor w/ Swap Delay 120 seconds 121 seconds
Negative Drift 120 seconds 121 seconds
Life and Health Fault 6 hours 6 hours + 1 second
Other 1 second 8 seconds
When ordered the ULTIMA X5000 comes with three SPDT (single pole double throw) relays which include
normally open, common and normally closed contact terminals. Two of the relays correlate to gas reading
and can be configured for either de-energized or energized operation and also may be configured as latching
or non-latching. The third relay is a dedicated fault relay. The fault relay is configured as normally energized,
non-latching. This normally energized default setting is for fail-safe operation and cannot be reconfigured.
In the event of a failure, including loss of power, the fault relay will change state to indicate a fault condition.
The safety function of the ULTIMA X5000 Gas Monitor does not include:
HART Communication
RS-485 Modbus communication
Bluetooth communication
HART, Modbus and Bluetooth communication are typically used for field device setup, diagnostics, and
troubleshooting. Carefully observe requirements for interfacing in hazardous locations. HART, Modbus and
Bluetooth communication are non-interfering functions and do not interrupt the safety critical function of the
detector.
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