TC 816 Operation Manual
THERMON…The Heat Tracing Specialists
®
Operation Manual 0503 E TC 816
Page 5 of 42
2
The TC 816 for Process Temperature Maintenance
The enclosure of the TC 816 is constructed to be mounted on the back plane of a panel. The enclosure facili-
tates 6 slots for electronic modules, each having its particular task.
Below the slots and the possible modules are described from the most right position to the left:
2.1
Slot 1: For AF TPA Thermon Power supply module AC
The AF TPA module is a multi voltage switching power supply suitable for voltages between 85 and 265 Vac
50/60 Hz.
This module also facilitates voltage free alarm contacts for:
•
HI-Alarm: -
high
temperature
- high current (only if AF TIC module is applied in slot 6)
- open or short circuited RTD sensor
•
LO-Alarm: - low temperature
- low current (only if AF TIC module is applied in slot 6)
•
DEV-Alarm: - too much deviation from temperature set point
- too much deviation from load current set point (only if AF TIC module is applied in slot 6)
•
System-Al.: Hardware controlled self check
2.2
Slot 2: For AF TC4 or AF TC5 Tracing Central processing module
The AF TC4 or AF TC5 can be inserted into slot 2 as central processing module. The central processing mod-
ule is the intelligence of the TC 816. It allows the controller independent operation. This means, that the TC
816 can operate even if the communication bus is disconnected.
The non volatile memory of the AF TC4 and AF TC5 modules enables fast and safe start-up and recovery after
eventual power failures. The last set parameter values are still stored in the memory.
The AF TC4 central processing module facilitates a 24 Vdc digital input and 2 separate RS 485 communication
busses (utilising galvanic separation).
The AF TC5 central processing module facilitates a 24 Vdc digital input, a RS 485 communication bus and
independent standard Profibus connection (both interfaces utilising galvanic separation).
