Product Overview
TM40/40U Rev. (Af), February 2019
29
Notes:
•
The auxiliary relay is available only in models with suffix
–
4XXXX
and 5XXXX
•
The 0
–
20mA is available only in models with suffix
–
1XXXX,
2XXXX, and 3XXXX
2.5.7
Auxiliary Relay as End-of-Line
The auxiliary relay can be used as End-of-Line in models with suffix
–
4XXXX and
5XXXX only. In this case, the auxiliary relay is active as long as the detector is
powered.
2.6
Internal Detector Tests
The detector performs 2 types of self-tests:
•
Continuous Feature Test, page 29
•
Built-In-Test (BIT), page 30
2.6.1
Continuous Feature Test
During normal operation, the detector tests itself continuously and indicates a
fault if a failure is found. This type of test complies with SIL-2 requirements.
The detector continuously tests:
•
Input voltage level
•
All internal regulator voltage levels
•
Voltage level status of sensor and sensor circuitry for noise or disconnection
in the electronic circuitry
•
0
–
20mA level output
•
Relays and heater operation
•
Processor watchdog
•
Software
•
Memory
•
Oscillator frequency
