1 5 Analog input KL3351, KL3356 Measurement technology | Measurement bridge (strain gauge) 1-channel analog input terminal, resistor bridge (strain gauge) 1-channel analog input terminal, accurate resistor bridge evaluation Technical data KL3351 | KS3351 KL3356 | KS3356 Signal voltage Resolution UD: -16…+16 mV UREF: -10…+10 V 16 bit UD: -20…+20 mV UREF: -12…+12 V Technology strain gauge connection strain gauge connection Conversion time < 250 ms, configurable < 250 ms, configurable Number of inputs 2, for one resistor bridge 2, for one resistor bridge +UV +UREF +UV +UREF 1 5 -UD -UD 2 6 +UD +Uv 2 6 +UD -UREF -UREF Bus Terminal 3 7 4 8 -UV –Uv 3 7 4 8 -UV 460 The KL3351 analog input terminal permits direct connection of a resistor bridge. The bridge voltage, UD, and the supply voltage, UREF, to the bridge are digitised with 16 bit resolution, and are transmitted along an electrically isolated channel to the supervising automation system. The input channels are available in the form of two 16 bit values for further processing. The resulting measurement can be calculated from the formula: measurement = UD/UREF. Precise acquisition of the supply voltage along with the bridge voltage compensates for long-term and temperature drift. The KL3356 analog input terminal permits direct connection of a resistor bridge. Its improved input circuit makes the KL3356 significantly more accurate than the KL3351. The ratio between the bridge voltage UD and the supply voltage UREF is determined in the input circuit. In order to achieve good long-term stability, the complete circuit is re-calibrated at least every three minutes. This procedure can be synchronised by the control in order to prevent the calibration leading to a delay in the production process. Measuring error < ±0.1 % (relative to full scale value) < ±0.01 % (relative to full scale value) Current consumption – (no power contacts) only load power contacts Current consumption K-bus typ. 65 mA typ. 85 mA Internal resistance > 200 kΩ (UREF), > 1 MΩ (UD) > 200 kΩ (UREF), > 1 MΩ (UD) Power supply UV 5 V DC, max. 20 mA via power contacts Filter 50 Hz, configurable 50 Hz, configurable Special features with internal bridge supply increased measuring accuracy, self-calibration Operating temperature 0…+55 °C 0…+55 °C Approvals CE, UL, Ex CE, UL, Ex Weight approx. 70 g approx. 75 g Further information www.beckhoff.com/KL3351 www.beckhoff.com/KL3356 Special terminals KL3351-0001 Distinguishing features with faster measurement time approx. 10 ms We reserve the right to make technical changes.
1 5 KL3361, KL3362 Analog input Measurement technology | Oscilloscope 1-channel analog input terminal, oscilloscope, -16…+16 mV 2-channel analog input terminal, oscilloscope, -10…+10 mV Technical data KL3361 | KS3361 KL3362 | KS3362 Signal voltage UIN: -16…+16 mV -10…+10 V Resolution 14 bit + sign Technology high-speed data logger high-speed data logger Conversion time < 100 µs, configurable (10 µs with fast sampling mode) < 100 µs, configurable (10 µs with fast sampling mode) Number of inputs 1 analog, 1 trigger 2 analog, 1 trigger +UV 1 5 -UB +UB 2 6 2 6 3 7 4 8 -UV 3 7 4 8 Bus Terminal 461 The KL3361 and KL3362 analog input terminals make it possible to perform non-central preliminary processing of analog values. The input values are digitised with a 14-bit resolution and written into an internal memory. An efficient processor can pre-process the values. Limit values, maximum and minimum values will be determined or monitored. The Bus Terminals can also carry out envelope curve monitoring. A trigger starts cyclical processes. The result or all the measured values are transported to the higher-level automation unit. Measuring error < ±1 % (relative to full scale value) < ±0.5 % (relative to full scale value) Current consumption – (no power contacts) – (no power contacts) power contacts Current consumption typ. 120 mA with external SG power supply, typ. 140 mA typ. 120 mA K-bus with internal SG power supply from terminal (4 x 350 Ω) Internal resistance > 1 MΩ (UB) > 500 kΩ Supply voltage 5 V DC, max. 20 mA – Power supply via the K-bus via the K-bus Internal memory 32 kbytes 32 kbytes Special features high-speed strain gauge analysis (for all fieldbuses) high-speed analog analysis Operating temperature 0…+55 °C 0…+55 °C Approvals CE, UL, Ex CE, UL, Ex Weight approx. 55 g approx. 55 g Further information www.beckhoff.com/KL3361 www.beckhoff.com/KL3362 We reserve the right to make technical changes.