Analog Input
KL3311, KL3312
+ TC1
- TC1
Shield
Shield
Run LED1
Error LED1
Top view
Contact assembly
Connection
+TC
-TC
Observe for earthed thermocoupler: differential inputs max. ± 2 V to ground
+ TC1
- TC1
Shield
+ TC2
- TC2
Shield
Run LED1
Run LED2
Error LED1
Error LED2
Top view
Contact assembly
Connection
+TC
-TC
Observe for earthed thermocoupler: differential inputs max. ± 2 V to ground
KL3311, KL3312 | 1-, 2-channel thermocouple input terminals with open-circuit recognition
The KL3311 and KL3312 analog input terminals allow 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 is realised with the aid of a microprocessor. The temperature range can be selected freely. The error LEDs indicate a broken wire. Compensation for the cold junction is made through an internal temperature measurement at the terminals. The KL3311/KL3312 can also be used for mV measurement.
| Technical data | KL3311 | KL3312 |
|---|---|---|
| Number of inputs | 1 | 2 |
| 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 | ~ 200 ms | ~ 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. 65 mA | |
| Bit width in the process image | input: 1 x 16 bit data (1 x 8 bit control/status optional) | input: 2 x 16 bit data (2 x 8 bit control/status optional) |
| Configuration | no address setting, configuration via Bus Coupler or controller | |
| Weight | 70 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 | |
| Special terminals | |
|---|---|
| KL3312-0010 |
type J |
| KL3312-0011 |
type J in Siemens S5 format |
| KL3312-0012 |
type L |
| KL3312-0013 |
type L in Siemens S5 format |
| KL3312-0014 |
type B |
| KL3312-0015 |
type B in Siemens S5 format |
| KL3312-0016 |
type E |
| KL3312-0017 |
type E in Siemens S5 format |
| KL3312-0018 |
type N |
| KL3312-0019 |
type N in Siemens S5 format |
| KL3312-0020 |
type R |
| KL3312-0021 |
type R in Siemens S5 format |
| KL3312-0022 |
type S |
| KL3312-0023 |
type S in Siemens S5 format |
| KL3312-0024 |
type T |
| KL3312-0025 |
type T in Siemens S5 format |
| KL3312-0026 |
type U |
| KL3312-0027 |
type U in Siemens S5 format |
| KL3312-0028 |
0…120 mV measurement |
| KL3312-0029 |
type K in Siemens S5 format |
| KL3312-0040 |
expanded temperature range for type S and L type S: -50…+1,700 °C (as supplied type L: -100…+900 °C) |
| KL3312-0110 |
type J, Fahrenheit scaling |
| KL3312-2000 |
setting of reference junction temperature via process image, unit 1/256° C in a 16 bit word |
| KL3312-2100 |
external reference point temperature specification via process image is possible, the unit is 1/256 °C in 16-bit format, fast conversion time 65 ms |