Schwank ThermoControl Plus 2 - Manual (Page 22)

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6.2 Sensor connections
The sensor is connected with two wires. The sensor does not require shielded cable, because the
controller includes effective protection. The length of wire up to 650 ft (200 m) does not influence
the accuracy of the temperature measurement. Do not run the sensor lead next to high voltage
wires. The sensor connection must match the selected operating program (single- and/or two-stage
zones). Unused inputs must be kept free of usage!
6.3 Heater Connection
Only 24Vac Class 2 equipment can be connected to the controller! The controller interior
relays switch 24Vac to the connection terminals (wet contact). Use external (field supplied) 24Vac
Class 2 rated power relays to control heaters and ancillaries. Note that the total load is limited to
6.3 A.
6.4 Zone Configuration – Standard Tube Heaters (single firing rate)
Standard tube heater zones can be set up as single-stage, or two-stage. Two-stage zones have a
proportion of the heaters on low-stage, with the balance of the heaters in the zone on high-stage.
Refer to sections 5 and 5.2. A zone can contain up to ten standard tube heaters. The location of
the jumper in P1 … P3 determines the quantity of single-stage and two-stage zones. Refer to
configuration diagram below and wiring diagram (Section 8.1) for standard tube heaters.
DO NOT USE
FAN OUTPUTS
(SEE SECTION
5.2)
FAN OUTPUTS
FOR TWO-
STAGE
LUMINOUS
ONLY