Heating Control And Current (Ct) Application - gefran 650 Installation And Instruction Manual

5.2.

Heating control and current (CT) application

A 650 controller (model 650–D-R00-00100-1) controls a
heating element via a solid-state relay connected to a logic
output.
A TC sensor measures the temperature.
Each branch of the circuit is protected by a fuse.
The alarm relay is protected by a snubber.
A current transformer is connected to a dedicated input to
indirectly measure electrical consumption.
The following diagram shows the various connections.
One switch can control more than one controller.
5.2.1. Connection diagram
L
Controller fuse
N
80208G_MHW_650-1250-1350_01-2017_ENG
Fuse alarm
relay
19
Snubber
20
Alarm 21
relay
22
23
24
5. Examples and applicative notes
With Quick Configuration you set:
• sensor type (TC);
• unit of measurement of temperature (°C);
• the logic output function (HEAT);
• the relay output function (ALRM1);
• the full-scale value of the CT1 current transformer (HI.
CT1)
• the setpoint, i.e. the temperature to be maintained
(SETP);
• the temperature value that trips the alarm (ALRM1).
Heating element
Current
transformer
7 6
8
5
9 4
10 3
11 2
12 1
650 Controller
fuse
Solid state
relay
+
Heating
element
-
T/C
139