User Manual

Siemens Building Technologies CA1N5321E / 11.1998
Landis & Staefa Division 1/2
60256
+
2.5 K
–
BA-T1
Digital temperature
indicator for L&S T1
sensors
Single point digital temperature
indicator for L&S T1 sensors. Suitable
for mounting on front of control
panels.
BA-T1
Technical data
Supply voltage Low voltage (SELV, PELV)
Nominal voltage AC 24 V, 50/60 Hz
– Max. voltage tolerance +10/–15 %
Power consumption ≤ 2.5 VA
Primary fuse None
Measuring input:
T1 sensor input Input resistance ≥100 MΩ
T1 supply voltage 10 kΩ from 15 V
ref.
Calibration of measured value ± 2.5 K (trimmer potentiometer)
Display LCD, 3½ -digit, with 1 character
space for engineering unit [°C]
– Height of digits 10 mm
Measuring range – 50 ...150 °C
Resolution 0.1 °C
Accuracy ± 0.6 °C
Measuring cycle 0.3 s
Error indication Open circuit: ' I '
Short circuit: '– I'
Frame colour (front) NCS 5005 R20B (light grey)
Maintenance None required
Connection terminals Screw terminals for max. 2.5 mm
2
Connecting cable See installation notes
Weight (including packaging) 0.16 kg
Dimensions (W x H x D) 72 x 36 x 90 mm
General ambient conditions
Conditions of use For indoor use, inside control panel
Temperature range:
– Operation 0 ... 50 °C
– Storage / transport – 20 ... 60 °C
Ambient humidity:
– Operation 5 ... 85 %rh, without condensation
– Storage/ transport Max. 95 %rh, without condensation
Mounting Flush-mounted on panel fronts
Orientation Any
Safety
Product safety EN60730-1
– Overvoltage category I I
– Contamination level 2
Electrical safety SELV-E (PELV to IEC364-4-41)
Conformity Meets the requirements for marking
Principle of operation
The temperature, measured by an external L&S T1 temperature sensor is
displayed digitally. The supply voltage and input signal for the indicator are
electrically isolated by a built-in isolating transformer.
The digital indicator is compatible with controllers which use the L&S T1
measuring bridge. The BA-T1 indicator may also be used as a (stand-alone)
thermometer.
The temperature display can be calibrated with a trimmer potentiometer.
Trimmer potentiometer
5
321