S+S Regeltechnik THERMASGARD MODBUS Notice D'instruction page 10

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THERMASGARD ®
Calibrateable temperature sensors with Modbus connection.
For more information, please refer to device-specific instructions.
TECHNICAL DATA:
Voltage supply: ......................... 24 V AC (± 20 %) and
Power consumption: .................. < 1 VA ⁄ 24 V DC
Sensor: .................................... Pt1000 (according to DIN EN 60751, class B)
Measuring range: ...................... – 50...+ 150 °C
Temperature deviation: ............. ± 0.5 K at +20 °C
Zero point offset: ..................... ± 10 °C (temperature)
Ambient temperature: ............... – 30...+ 70 °C
Medium: ................................... clean air and
Bus interface: .......................... RS 485, galvanically isolated,
Bus protocol: ............................ Modbus (RTU-Mode)
Baud rate: ................................ 9600, 19200, 38400 Baud
Status indicator: ...................... LED green = Telegram valid
Error detection: ........................ sensor breakage, sensor short circuit
Signal filtering: .......................... 0.3 s / 1 s / 10 s
MODBUS | Configuration
15...36 V DC (± 10 %)
< 2.2 VA ⁄ 24 V AC
depending on the type of device
non-aggressive, non-combustible gases
Bus termination activatable via DIP switches
Up to 32 devices possible in one segment.
In case of a greater number of devices,
RS 485 transceivers must be used.
Address range 0...247 selectable
LED red = Telegram error
Plug for
display
Schematic diagram
Plug for
display
ON DIP A
1 2 3 4 5 6 7 8
ON DIP B
1 2 3 4 5 6
1 2 3 4 5
Zero point calibration
The sensors are preset and calibrated at the factory.
Adjustment is possible using the two offset potentio-
meters.
Range of adjustment: approx. ± 10 °C.
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Rev. 2015 - 1.0 GB intro
®
THERMASGARD MODBUS
ON DIP A
1 2 3 4 5 6 7 8
ON DIP B
1 2 3 4 5 6
1 2 3 4 5
DIP A: Bus address
DIP B: Bus parameters
(Baud rate, parity ...)
Telegram indicator
Reception (LED green)
Error (LED red)
LED (internal status)
Offset correction
temperature: ± 10°C
Plug for display
contact is
on the right side
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