4-channel input terminal PT100 (RTD) KL3204
Error LED1
Error LED3
Error LED2
Error LED4
+R1
-R1
+R3
-R3
+R2
-R2
+R4
-R4
Top view 
Contact assembly 
extended temperature range
extended shock and vibration range

KL3204 | 4-channel input terminal PT100 (RTD)

The KL3204 analog input terminal allows resistance sensors to be connected directly. The Bus Terminal’s circuitry can operate the sensors using 2-wire connection techniques. Linearisation over the full temperature range is realised with the aid of a microprocessor. The temperature range can be selected freely. The Bus Terminals standard settings are: resolution 0.1 °C in the temperature range of PT100 sensors. The error LEDs indicate sensor faults (e.g. a broken wire). The KL3204 version combines four channels in one housing.

Technical data KL3204 | KS3204
Number of inputs 4
Power supply via the K-bus
Technology 2-wire
Sensor types PT100, PT200, PT500, PT1000, Ni100, Ni120, Ni1000 resistance measurement (e.g. potentiometer, 10 Ω…1.2/5 kΩ)
Connection method 2-wire
Measuring range -200…+850 °C (PT sensors); -60…+250 °C (Ni sensors)
Resolution 0.1 °C per digit
Conversion time ~ 250 ms
Measuring current typ. 0.5 mA
Measuring error < ±1 °C
Electrical isolation 500 V (K-bus/signal voltage)
Current consumption power contacts – (no power contacts)
Current consumpt. K-bus typ. 60 mA
Bit width in the process image input: 4 x 16 bit data (4 x 8 bit control/status optional)
Configuration no address setting, configuration via Bus Coupler or controller
Special features open-circuit recognition
Weight approx. 70 g
Operating/storage temperature -25…+60 °C/-40…+85 °C
Relative humidity 95 %, no condensation
Vibration/shock resistance conforms to EN 60068-2-6/EN 60068-2-27
EMC immunity/emission conforms to EN 61000-6-2/EN 61000-6-4
Protect. class/installation pos. IP 20/variable
Pluggable wiring for all KSxxxx Bus Terminals
Approvals CE, UL, Ex, GL
Special terminals
KL3204-0014 PT1000
KL3204-0021 PT100 in Siemens S5 format
KL3204-0025 Ni1000, 4-channel
KL3204-0029 Ni1000 per Landis&Staefa characteristic curve (Siemens, 100° corresponds to 1,500 Ω)
KL3204-0030 4-channel input terminal NTC (10 kΩ) for resistance sensors, 16 bit, 2-wire system