TC 816 Operation Manual
THERMON…The Heat Tracing Specialists
®
Page 16 of 42
Operation Manual 0503 E TC 816
Description:
3.6.1
Heat Tracing Circuit Numbers and TC 816 Zone Numbers
In order to properly configure the TC 816 it is very important to know the difference between heat tracing
circuit numbers and TC 816 Zone numbers. In this manual referred to as circuit numbers and zone numbers.
Zone Numbers:
Each TC 816 could count up to 32 analogue inputs depending on its configuration. Each analogue input is
called a Zone. With the TC 816 there is a clear distinction between temperature input Zones and current input
zones. The type of Zone can easily be recognised by their number:
•
Zone 1 through 16:
Temperature input Zones (2 x AF TIT, each 8 Zones)
•
Zone 17 through 32:
Load current input Zones (1 x AF TIC, 16 Zones)
For each particular Zone, 29 so called Zone parameters can be set.
Circuit Numbers:
Multiple Zone numbers of particular TC 816 controllers can be assigned to one Heat Tracing Circuit Number.
For instance, the in Figure 4.6 displayed Circuit 001 could include analogue inputs (Zones) for:
•
A pipe temperature control (
CONTROLLER
-line), using:
Zone 1 of TC 816 controller with communication address 1.
•
A temperature sensor for heat tracing cable temperature limitation (
LIMITER
-line), using:
Zone 1 of TC 816 controller (configured for Heat Tracing Cable Temperature Limiter concept) with
communication address 2.
•
A load current input for heat tracing circuit load current monitoring (
CURRENT
-line) , using:
Zone 17 of TC 816 controller with communication address 1.
The TC 816 automatically assigns Zone 17 to Zone 1 of the same controller if at start-up an AF TIC Tracing
Input module for load Current is detected.
