TT-S4/D
1877E FEB 02
INSTRUCTION
INSTRUCTION
Step controller for electric heating
TT-S4/D is a micro-processor based step controller designed for use
together with Regin's TTC and AQUA-controllers. It has a control
input signal of 0 - 10V DC. It has four relay outputs for controlling
four heater groups. The TT-S4/D can be set to control either a
heater with equal loads giving 4 steps or a heater where the load is
binary divided giving 31 steps. The TT-S4/D also has a 0 - 10V DC
output for controlling a triac controller for smoothing the power
output between the relay steps. The maximum number of relay steps
can be limited using a switch on the front.
TT-S4/D has a built in test program for simple function testing.
TT-S4/D is built for DIN-rail mounting with all settings accessible on
the front.
Installation
Mount the TT-S4/D on a DIN-rail in a cabinet or other enclosure.
Protection class
IP20.
Ambient temperature
0 -50°C.
Wiring
Supply voltage
Supply voltage:24V AC +/-15% 50-60Hz.
Power consumption: 6 VA.
Terminal 11 = Phase.
Terminal 12 = Neutral.
Control input
Control voltage 0 - 10V DC from a TTC40F, TTC25, AQUA-controller
or other controller with a 0 - 10V input.
Terminal 13 = 0 - 10V DC input.
Terminal 15 = Signal neutral.
Control output
The control output is used to control a triac controller that will give 0
- 100% power between each relay step. The load connected to the
triac controller should have the same size as the load connected to
relay 1.
TT-S4/D automatically adjusts the ratio between the input signal and
the output signal according to the setting of the maximum step
switch.
Terminal 19 = 0 - 10V DC output.
Terminal 21 = Signal neutral.
Relay outputs
Relays 1 - 4, SPST with a common supply pole. 240V AC 2A
total.
When the heater is binary divided the loads must be wired in
rising size with the smallest load on relay 1.
Terminal 6 = Common relay input 2A 250V AC.
Terminal 1 = Relay 1 output.
Terminal 2 = Relay 2 output.
Terminal 3 = Relay 3 output.
Terminal 4 = Relay 4 output.
N.B.
The supply to terminal 6 must be wired so that the power is
cut in the event of the fan motor relay or the heater high-limit
switch tripping.
Signal converter
TT-S4/D contains a signal converter that converts a 10 - 2V DC
input signal to a 0 - 10V DC output signal.
This is used when TT-S4/D is controlled by for example TA-
controllers with a 10 - 2V DC output.
Terminal 14 = 10 - 2V DC input
Terminal 20 = 0 - 10V DC output, connect to terminal 13.
Settings
Maximum number of permitted relay steps
With the rotary switch you set the maximum number of relay
steps to be used.
To ensure correct control it is important that the switch is
correctly set.
Position 0 is the starting position for the built-in test function.
Binary - Sequential switch
Set to S if all the load is divided into equal parts.
Set to B if the load is Binary divided, i.e. if the parts have the
size-ratio of 1:2:4:8.
Figures
Fig 1
Wiring of TTC40F/TTC25 when the system is
controlled by a sensor connected to TTC40F/TTC25
Fig 2
Wiring of TTC40FX/TTC25X and 0 - 10V DC control
signal from an external source.
Fig 3
Wiring of TTC40FX/TTC25X and 10 - 2V DC control
signal from an external source.
!
IMPORTANT: Read these
instructions before installation
and wiring of the product.
4"
2.9"
3.3"
TT-S4/D
Fig 1
Fig 2
TTC25
TTC40F
TT-S4/D
7
8
9
13
19
21
TTC25X
TTC40FX
TT-S4/D
8
9
13
15
19
0 - 10V DC in
+
0
21
