S+S Regeltechnik THERMASREG FM Series, Operating Instructions, Mounting & Installation

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G
THERM ASREG ® FM 010
THERMASREG
®
FM 010 is a communicative built-in controller for climate control convectors, or air conditioning or heating units (for up to 3 ventilator
steps and for one heating and one cooling valve). It can either be operated independently, or in connection with a superior control device (SPS ⁄ DDC or
Soft SPS), a building management system (e.g. RcWare Vision), or another monitoring, control and data acquisition system being applicable as Modbus
master. As single room units, MBR 010 or MBR 011 are applied.
TECHNICAL DATA:
Power consumption: ...................... 24 V AC (± 10 %)
700 mVA + peripheral devices (ca. 5 VA)
Measuring range: ........................... – 20 ... + 50 °C
Sensor accuracy: ........................... according to DIN IEC751, class B
Inputs: .............................................. 2 x DI for one potential-free contact,
24 V AC, 15 mA
Outputs: ........................................... 2 x semiconductor relay for AC load, zero switching,
24 V AC, max. switching current 0.4 A,
recommended thermal actuators are
Siemens STA71, Danfoss TWA (24 V types),
3 x relay 230 V ⁄ 5 A
Communication: .............................. with room devices:
RS485 – Modbus RTU, 9600, N, 8, 1, master
with the building management system:
RS485 – Modbus RTU, 9600, N, 8, 1, slave
Dimensions: ..................................... 75 x 90 x 24 mm (without retainer)
104 x 90 x 24 mm (with retainer)
Electrical connection: .................... 0.14 - 1.5 mm 2 via screw terminals
Installation: ...................................... by 2 screws,
DIN top hat rail adapter optional
Protection class: ............................ II (according to EN 60 730)
Protection type: ............................. IP 20 (according to EN 60 529)
Standards: ....................................... CE conformity,
electromagnetic compatibility
according to EN 61 326 + A1 + A2,
EMC directive 89 ⁄ 336 ⁄ EEC,
low-voltage directive 73 ⁄ 23 ⁄ EEC
FUNCTION:
The controller communicates with a room unit via an assigned bus (K2+, K2-). The room unit detects the room temperature. Setpoint adjustment via
turning knob and taking over of default control signal into the operating mode by shortly pressing the knob, or via the menu. The room temperature
is measured in the range form – 20 °C to + 50 °C. The detected and the input values are processed by a PI-algorithm, at the output of which pulse
width modulated two-way thyristors (PWM TRIAC) for activating the thermovalves are installed.
These controllers are intended for operation in a normal and chemically non-aggressive environment. They do not require any maintenance or servic-
ing. They are mounted with two screws to a flat surface, e.g. on the fan coil convector body, or on an installation plate. The retainers can be removed
and an optionally available DIN top hat rail adapter can be attached at the bottom of the controller.
The controller includes a real-time clock with a week programme time switch (6 switching events per day). That switches over between 3 operating
modes: normal temperature, temperature setback, and OFF. The controller has two digital inputs, one for a presence detector (access card reader,
passive infrared sensor, etc.) and one for a window contact or dew point sensor (switches to OFF). Both contacts can be used as breaker or nor-
mally open contacts. The selection is made via configuration software.
The ventilator steps are either regulated automatically (with control offset, or better via a PID controller output), or manually (if this function is
selected). Three LEDs indicate correct functioning: green (PWR) fan power supply OK, red (TX1) – data transmission to the building automation bus,
and red (TX2) – data transmission to the room unit. On top are four DIP switches: K1 Bus End and INIT to set the ex-factory default settings.
The controller communicates with the central building control system via a RS485 bus with Modbus RTU and therefore, can be applied in connection
with various control systems. See variables list (Modbus table) in the separate document Room devices and Controllers, transmission protocol.
Another bus K2 communicates with the room unit. Configuration software is used for configuration and commissioning of this device, which can be
downloaded at www.spluss.de free of charge.
Type ⁄ WG1 Application
FM 010
Field bus module (Modbus) for fan coil convectors
Note: For single room devices, MBR 010 or MBR 011 are used.