Modular device for DIN-EN 60715 TH35 rail mounting. 1 module = 18mm wide, 58mm deep.

State-of-the-art hybrid technology combines advantages of nonwearing electronic control with

high capacity of special relays.

Connection to the Eltako RS485 bus, terminals RSA and RSB.

Up to a total of 128 actuators can be added in this way.

Patented Eltako Duplex technology (DX) allows you to switch normally potential free contacts

in zero passage switching when 230V A/C voltage 50Hz is switched. This drastically

reduces wear. To achieve this, simply connect the N conductor to the terminal (N) and L to

K(L). This results in an additional standby consumption of only 0.1 watt.

The 12V DC supply voltage of the complete RS485 bus is mainly powered at 6W, 12W or

24W by a switch mode power supply unit SNT12-12V DC that is only 1 or 2 pitch units wide.

When all 4 relays of the F4H12 are switched on, 1 watt is required.

This heating relay evaluates the information of each wireless temperature controller via a

wireless antenna module FAM12-12V DC for each channel. If required, this information may be

supplemented by a window/door contact or a Hoppe window handle.

Top rotary switch for adjustable hysteresis:

Left stop:

lowest hysteresis 0.5º. Right stop: largest hysteresis 4.5º.

Inbetween, divisions in steps of 0.5°.

Middle rotary switch for regulation types:

AUTO 1:

With PWM control at T = 4 minutes. (PWM = pulse width modulation).

(suitable for valves with thermoelectric valve drive)

AUTO 2:

With PWM control at T = 15 minutes. (suitable for valves with motor-driven valve drive)

AUTO 3:

With 2-point control.

The bottom rotary switch LRN is required for teach-in and is set to AUTO in operating mode.

Two-point control mode:

The hysteresis rotary switch sets the required difference between the switch-on and switch-off temperatures.

When the 'actual temperature >= reference temperature', the device is switched off.

When the 'actual temperature <= (reference temperature – hysteresis)', the device is switched on.

PWM control mode:

The hysteresis rotary switch set the required temperature difference at which the device is switched on at

100%. When the 'actual temperature >= reference temperature', the device is switched off.

When the 'actual temperature <= (reference temperature – hysteresis)', the device is switched on at 100%. If the 'actual temperature'

lies between the 'reference temperature – hysteresis' and the 'reference temperature', the device is switched on and off with a PWM

in steps of 10% depending on the temperature difference. The lower the temperature difference, the shorter the switch-on time. As

a result of the settability of the 100% value, the PWM can be adapted to the heater size and inertia.

The

frost protection function is always enabled. As soon as the actual temperature drops below 8°C, the temperature is controlled in

the selected operating mode to 8°C.

If a window/door contact FTK or a Hoppe window handle was taught-in to a channel,

the channel is switched off as long as

the window is open. However, the frost protection remains enabled.

Wireless switches FT4 can be taught-in for each channel or for many channels in a group.

The assignment of the 4 keys is assigned

with the following fixed functions: Top right: Normal mode, can also be enabled by timer. Bottom right: Night setback mode

by 4°. Top left: Setback mode by 2°. Bottom left: Off (frost protection stays enabled).

The LED

below the upper function rotary switch performs during the teach-in process according to the operation manual. It shows

control commands by short flickering during operation.