Installing the Detector
TM40/40U Rev. (Af), February 2019
43
Notes:
•
RS-485 is used for the communication network as specified in
Appendix Appendix C: (Terminals 10, 11, and 12) and to connect
(in a safe area) to a PC or laptop for configuration and diagnostics.
•
Alarm relay:
•
N.O. contact in wiring options 1, 4, and 5.
•
N.O. and N.C. in wiring options 2 and 3.
•
0
–20mA is “Sink” in option 1 and “Source” in options 2 and 3.
•
0
–
20mA options 1, 2, and 3 are available with the HART protocol.
•
In wiring option 1, link Terminals 1 and 8 to change the mA output
to “Source.”
•
The fault output is N.C. energized SPST relay. The contacts are
closed when the detector is in its normal operational condition in
options 1, 2, and 4, and available as N.O. energized in options 3
and 5.
•
The auxiliary output is N.O. (SPST) relay. Depending on the
function configuration, the auxiliary relay may act in parallel with
the alarm relay to activate another external device, or it may
provide a warning signal.
3.8
Configuring Your Detector
You can reprogram the function setup using the RS-485 connection or the HART
protocol as follows:
•
HART Protocol
: Refer to
Manual
TM777030
for programming instructions.
These functions enable you to set:
•
Alarm delay
•
Address setup
•
Mode of operation
•
Heated optics operation
The factory default settings listed for each function include:
•
Alarm Delay
–
3 sec
•
Alarm Latch
–
No
•
Auxiliary Relay
–
No
•
Automatic BIT
–
Yes
•
Alarm BIT
–
No
•
Auxiliary BIT - No
•
EOL
–
No
•
Heated Optics
–
Auto
•
Temperature
–
41°F/5°C
