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Beckhoff Automation Pty. Ltd.

Building 4, 163–179 Forster Road
Mount Waverley, VIC 3149, Australia

+61 3 9912 5430
info@beckhoff.com.au
www.beckhoff.com/en-au/

KL3312 | Bus Terminal, 2-channel analog input, temperature, thermocouple, 16 bit

KL3312 | Bus Terminal, 2-channel analog input, temperature, thermocouple, 16 bit

KL3312 | Bus Terminal, 2-channel analog input, temperature, thermocouple, 16 bit

Run LED 1
Error LED 1
Run LED 2
Error LED 2
+TC1
-TC1
Shield
+TC2
-TC2
Shield
Top view 
Contact assembly 
Observe for earthed
thermocoupler:
differential inputs
max. ± 2 V to ground
KL3312 | Bus Terminal, 2-channel analog input, temperature, thermocouple, 16 bit

KL3312 | Bus Terminal, 2-channel analog input, temperature, thermocouple, 16 bit

The KL3312 analog input terminal allows thermocouples to be connected directly. The Bus Terminal’s circuitry can operate thermocouple sensors using the 2-wire technique. Linearization over the full temperature range is realized 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 KL3312 can also be used for mV measurement.

Product status:

regular delivery

Product information

Technical dataKL3312
Number of inputs2
Power supplyvia the K-bus
Technology2-wire
Thermocouple sensor typestypes J, K, L, B, E, N, R, S, T, U (default setting type K), mV measurement
Connection method2-wire
Measuring rangein the range defined in each case for the sensor (default setting: type K; -100…+1370 °C);
mV measurement: ±30 mV…±120 mV
Conversion time~ 250 ms
Wiring fail indicationyes
Resolution0.1 °C per digit
Measurement error/ uncertainty< ±0.5 % (relative to full scale value)
Electrical isolation500 V (K-bus/signal voltage)
Current consumption power contacts– (no power contacts)
Current consumption K-bustyp. 65 mA
Bit width in the process imageinput: 2 x 16 bit data (2 x 8 bit control/status optional)
Configurationno address setting, configuration via Bus Coupler or controller
Weightapprox. 70 g
Operating/storage temperature0…+55 °C/-25…+85 °C
Relative humidity95 %, no condensation
Vibration/shock resistanceconforms to EN 60068-2-6/EN 60068-2-27
EMC immunity/emissionconforms to EN 61000-6-2/EN 61000-6-4
Protect. rating/installation pos.IP20/variable
Approvals/markingsCE, UL, ATEX, IECEx
Ex markingATEX:
II 3 G Ex ec IIC T4 Gc
IECEx:
Ex ec IIC T4 Gc
Housing dataKL-12-8pin
Design formcompact terminal housing with signal LEDs
Materialpolycarbonate
Dimensions (W x H x D)12 mm x 100 mm x 68 mm
Installationon 35 mm DIN rail, conforming to EN 60715 with lock
Side by side mounting by means ofdouble slot and key connection
Markinglabeling of the BZxxx series
Wiringsolid conductor (s), flexible conductor (st) and ferrule (f): spring actuation by screwdriver
Connection cross-sections*: 0.08…2.5 mm²,
st*: 0.08…2.5 mm²,
f*: 0.14…1.5 mm²
Connection cross-section AWGs*: AWG 28…14,
st*: AWG 28…14,
f*: AWG 26…16
Stripping length8…9 mm
Current load power contactsImax: 10 A

*s: solid wire; st: stranded wire; f: with ferrule

Ordering information
KL3312Bus Terminal, 2-channel analog input, temperature, thermocouple, 16 bit
KL3312-0010Bus Terminal, 2-channel analog input, temperature, thermocouple, 16 bit, type J
KL3312-0011Bus Terminal, 2-channel analog input, temperature, thermocouple, 16 bit, type J in Siemens S5 format
KL3312-0012Bus Terminal, 2-channel analog input, temperature, thermocouple, 16 bit, type L
KL3312-0013Bus Terminal, 2-channel analog input, temperature, thermocouple, 16 bit, type L in Siemens S5 format
KL3312-0014Bus Terminal, 2-channel analog input, temperature, thermocouple, 16 bit, type B
KL3312-0015Bus Terminal, 2-channel analog input, temperature, thermocouple, 16 bit, type B in Siemens S5 format
KL3312-0016Bus Terminal, 2-channel analog input, temperature, thermocouple, 16 bit, type E
KL3312-0017Bus Terminal, 2-channel analog input, temperature, thermocouple, 16 bit, type E in Siemens S5 format
KL3312-0018Bus Terminal, 2-channel analog input, temperature, thermocouple, 16 bit, type N
KL3312-0019Bus Terminal, 2-channel analog input, temperature, thermocouple, 16 bit, type N in Siemens S5 format
KL3312-0020Bus Terminal, 2-channel analog input, temperature, thermocouple, 16 bit, type R
KL3312-0021Bus Terminal, 2-channel analog input, temperature, thermocouple, 16 bit, type R in Siemens S5 format
KL3312-0022Bus Terminal, 2-channel analog input, temperature, thermocouple, 16 bit, type S
KL3312-0023Bus Terminal, 2-channel analog input, temperature, thermocouple, 16 bit, type S in Siemens S5 format
KL3312-0024Bus Terminal, 2-channel analog input, temperature, thermocouple, 16 bit, type T
KL3312-0025Bus Terminal, 2-channel analog input, temperature, thermocouple, 16 bit, type T in Siemens S5 format
KL3312-0026Bus Terminal, 2-channel analog input, temperature, thermocouple, 16 bit, type U
KL3312-0027Bus Terminal, 2-channel analog input, temperature, thermocouple, 16 bit, type U in Siemens S5 format
KL3312-0028Bus Terminal, 2-channel analog input, temperature, thermocouple, 16 bit, 0…120 mV measurement
KL3312-0029Bus Terminal, 2-channel analog input, temperature, thermocouple, 16 bit, type K in Siemens S5 format
KL3312-0040Bus Terminal, 2-channel analog input, temperature, thermocouple, 16 bit, expanded temperature range for type S and L; type S: -50…+1700 °C, as supplied type L: -100…+900 °C
KL3312-0110Bus Terminal, 2-channel analog input, temperature, thermocouple, 16 bit, type J, Fahrenheit scaling
KL3312-2000Bus Terminal, 2-channel analog input, temperature, thermocouple, 16 bit, setting of reference junction temperature via process image, unit 1/256 °C in a 16-bit word
KL3312-2100Bus Terminal, 2-channel analog input, temperature, thermocouple, 16 bit, 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.

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