S+S Regeltechnik THERMASGARD TM43 Operating Instructions, Mounting & Installation page 13

G U
Measuring transducers with active output
Circuit board
internal
sensor
Display
connector
internal
passive
sensor
(optional)
Automatic Output Switching
Patented analogue interface for automated output switching
(Patent no. DE 10 2015 015 941 B4)
Switching on the AOS unit will automatically analyse the network
connected to the outputs and set the relevant output type U or I.
Outputs that are not connected are detected as voltage outputs.
Network resistance > 15 kOhm => U output 0-10 V
Network resistance < 450 Ohm => I output 4...20 mA
The following applies to units with AOS multiple output:
if one of the outputs is detected as a current output,
all outputs are configured together as output type I.
Combined operation as current and voltage output is not possible.
The status LED indicates the detected output type.
Status LED
The status LED on the PCB shows the current operating mode
of the unit:
TM xx - A (AOS)
red ..........blinking ..........unit switching on
green .......steady light ...U output 0-10 V
orange .....steady light ...I output 4...20 mA
TM xx - I (2-wire I)
yellow ......blinking ..........unit switching on
yellow ......steady light ...I output 4...20 mA
DIP switches
O N
1 2 3 4
Status
LED
min.
±10K Offset
4 5 1 2 3
TM xx Display and internal diagnostics
THERMASGARD
Measuring transducer with display
max.
Readout in the display
Standard display
As standard, the first line indicates the actual temperature
at the unit. The value indicated depends on the system of
units set (DIP 4).
°C ............SI (default)
°F ............Imperial
Internal diagnostics
Sensor breakage or sensor short circuit are detected by
the unit and indicated in the display.
Err 1 ........Sensor breakage
Err 2 ........Sensor short circuit
Offset potentiometer
A potentiometer on the PCB is used to adjust the offset
manually. When the system is delivered, the potentiometer
is in centre position and lacquer-sealed.
Range of adjustment: approx. ± 10 K
13
®
Temperature
[°C]
Temperature
[°F]
Sensor breakage
Sensor short circuit
Rev. Data-V20