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pro17

CJ1 / CS1: Analog Inputs Pt100, TC, ...

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I am trying to do a HVAC application with CJ1 PLC, but have old peripheral sensors allready installed: Siemens (Landis&Gyr) QAM ... etc Some CJ1 thermocouple input units (PTS15) or universal input units (AD04U) can use Pt100, and ThermoCouple sensors. It states I can connect K, J, T, L, R, S, B thermocouples and/or Pt100, Pt1000, JPt100 inputs. Sensors that are used in this HVAC is LG-Ni1000 or T1(PTC)! Has anyone used this "old" sensors with Omron Input units? Maybe I will need a multiplexer to connect several sensors into one input - any suggestions? Has anyone used any converters LG-Ni1000 to 4..20mA or 0..10V? Best regards, Jinx P.S. Universal Input unit CJ1W-AD04U (4*I,U or TC inputs) costs around 40% less than CJ1W-PTS51 (only 4*TC inputs), and 65% less off PTS15 (2*TC inputs) Edited by pro17

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Ii would use a standard alanogue inputs card with either temp to 4-20mA tranducers or as u sugessted a multiplexer switched and controled by the PLC ... the second option probably been more cost effective.

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Hi, Do you have consided the TS561 (thermocouple) or TS562 (resistance thermometer) cards? They are fine to do basic applications and have 6 inputs each.

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Hi Sleepy Wombat, could you please suggest suitable multiplexer? After further investigation I found out LG-Ni1000 is not a thermocouple. It is RTD - resistor temperature detector, which changes resistence according to the temperature, like Pt100 does. look at this link: http://www.siemens.co.kr/bt/erp/erpmenus/p...les/QAM2120.pdf Edited by pro17

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