Analog Input
KL3314
+ TC1
- TC1
+ TC3
- TC3
+ TC2
- TC2
+ TC4
- TC4
Error LED1
Error LED2
Error LED3
Error LED4
Top view
Contact assembly
Connection
+TC
-TC
+TC
-TC
Observe for earthed thermocoupler: differential inputs max. ± 2 V to ground
KL3314 | 4-channel thermocouple input terminal with open-circuit recognition
The KL3314 analog input terminal allows four thermocouples to be connected directly. The Bus Terminal’s circuitry can operate thermocouple sensors using the 2-wire technique. Linearisation over the full temperature range, which can be selected freely, is realised with the aid of a microprocessor. The error LEDs indicate a broken wire. Compensation for the cold junction is made through an internal temperature measurement at the terminals. The KL3314 can also be used for mV measurement.
| Technical data | KL3314 |
|---|---|
| Number of inputs | 4 |
| Power supply | via the K-bus |
| Thermocouple sensor types | types J, K, L, B, E, N, R, S, T, U (default setting type K), mV measurement |
| Connection method | 2-wire |
| Temperature range | in the range defined in each case for the sensor (default setting: type K; -100…+1,370 °C) |
| Resolution | 0.1 °C per digit |
| Conversion time | ~ 250 ms |
| Wiring fail indication | yes |
| Measuring error | < ±0.5 % (relative to full scale value) |
| Electrical isolation | 500 Vrms (K-bus/signal voltage) |
| Current consumption K-bus | typ. 75 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 |
| Weight | 75 g |
| Operating/storage temperature | 0…+55 °C/-25…+85 °C |
| Relative humidity | 95 %, no condensation |
| Vibration/shock resistance | conforms to EN 60068-2-6/EN 60068-2-27/29 |
| EMC immunity/emission | conforms to EN 61000-6-2/EN 61000-6-4 |
| Protect. class/installation pos. | IP 20/variable |