ACTIONI/Q(R) Q486 AC Powered RTD, T/C, Ohm & mV Input Field Configurable Isolator Provides an Isolated DC Output in Proportion to the Temperature Signal Input Q486-0001 Instant AccuracyTM Field Configurable Input Ranges PC or DIP Switch Configuration Eliminates Ground Loops Description The Q486 is a DIN rail mount, RTD, thermocouple, mV or Ohm input signal conditioner with 1800V isolation between input, output and power. The field configurable input and output offers flexible, wide ranging capability for most temperature signal conditioning applications. The Q486 is configured via DIP switch for the thermocouple type (B, C, E, J, K, N, R, S, T) or the RTD type (Pt, Ni & Cu). Additionally, functions such as signal linearization, up or down scale burnout, number of RTD leads (2, 3, 4) and voltage or current output are also set via dip switches (see Tables). Configuration software, along with a serial port adapter cable is available for those who would prefer PC configuration capability. This Graphic User Interface (GUI) program takes the place of setting DIP switches and using the pushbutton for ranging. With this software, an input signal calibrator is not required for ranging since the values only need to be typed into the program and downloaded. TouchCAL Technology DIN Rail Mounting with IQRL Universal AC Power 85 to 265 VAC SnapLocTM Plug-in Terminals configured range for the J type thermocouple is -210 to 760C. Using a thermocouple simulator as a reference, the model Q486 could be ranged for 0 to 50C or 0 to 500C by simply applying the desired minimum and maximum input levels and pushing the range button to store the levels in non-volatile memory. The output is ranged by applying an input signal to achieve an accurate output level and pushing the range button. Applications The model Q486 field configurable thermocouple or RTD input isolator is useful in eliminating ground loops and interfacing temperature sensors to data acquisition and control systems. Three-way isolation completely eliminates ground loops from any source. Isolation protects expensive SCADA systems from ground faults and allows the noise reduction benefits of grounded thermocouples or sensors to be realized. Instant AccuracyTM Instant AccuracyTM maximizes accuracy and performance during warmup and during changes in ambient temperature. This patented cold-junction compensation technique utilizes two temperature sensors to measure the differential temperature near the terminal block. Using heat transfer calculations with the measured differential temperature and the known thermal conductivity of the PCB, the terminal junction temperature is determined with extreme accuracy. Even during unstable thermal states such as start-up, ambient temperature changes or changing load or power, the Q486 performs extremely accurate thermocouple temperature measurement. The Q486 employs the latest analog to digital signal processing technology and advanced low-power microprocessors. Instant Accuracy cold-junction-compensation (CJC) of thermocouples, and lead length compensation for RTDs ensures an extremely accurate and stable signal for virtually any temperature sensor to DC signal conversion. Instant Accuracy improves system performance and productivity due to reduced warm up time, fewer temperature measurement errors and tighter process control for higher quality. Most significantly, it allows calibration to be checked quickly and accurately without the effects of rapid ambient temperature changes due to opening a control panel door, which often causes erroneous readings and miscalibrations; a common cause of measurement errors. Diagnostic LEDS The Q486 is equipped with front panel LEDs for input power (green-on), input overrange and underrange; input open circuit (yellow-on); and switch setting error (red-on). TouchCALTM Technology TouchCALTM technology allows easy field ranging for any of the thermocouple or RTD input types. For example, the dip switch High density DIN rail mounting offers a very compact solution and saves valuable panel space. Power is delivered to the Q486 using the exclusive I/QRail which reduces wiring requirements and the need to daisy-chain power. SnapLoc terminals ensure easy installation and low Mean-Time-To-Repair (MTTR). Configuration The Q486 can be configured via DIP switchs for a wide variety of temperature input ranges for RTD, thermocouple, ohm and millivolt sensors. Inputs can be offset by >90% or adjusted down to <10% of the full scale span. Unless a specific customer range is ordered, the factory presets the Q486 as follows: Input Type: Input Range: Burnout: Output Range: 6. Set Burnout detection with position 6 of SW2 (see Table 6). The ON position (up scale) will force the output beyond full scale when the t/c input is open circuit. The OFF position (down scale) will force the output below 0% when the input is open circuit. Thermocouple, J-Type 0 to 500C Up Scale 4/20mA 7. Set the t/c Linearization function with position 7 of SW2 (see Table 7). The ON position will provide an output linear to the temperature input signal. The OFF position will provide an output directly proportional to the thermoelectric (mV) input (i.e. not linearized to temperature). Refer to the tables for other I/O ranges. 1. With power off, snap off the faceplate by lifting the right edge away from the heatsink. Note: The unit must be configured with linearization turned ON. Once the configuration is saved, linearization can then be turned OFF. 2. For RTD or Resistance inputs, set position 1 and 2 of SW2 for 2, 3 or 4 wire resistance input (see Table 1). For thermocouple inputs these switches ignored and can be in any position. 8. Set the Configuration Mode with position 8 of SW2 (see Table 8). The ON position is for DIP switch configuration. The OFF position is for configuring via PC using a serial interface cable (consult factory regarding cable and software). 3. Configure the output for voltage or current using position 3 of SW2 (see Table 2). 9. Set the Input Type with position 1 and 2 of SW3 (see Table 5). 4. If the input range desired is the full scale range for the input type (e.g. Pt100 Ohm = -200C to 850C), then set position 4 of SW2 to ON (or closed) for this default range (see Table 3). If configuration of a sub-range is preferred (e.g. Pt100 Ohm, 0 to 500C), then set position 4 of SW2 to OFF (or open) to enable use of the ranging pushbutton adjustment. 10. Set the specific RTD, thermocouple, millivolt or resistance input with position 3 through 6 of SW3 (see Table 9). Note: For PC configuration refer to the software manual and help files associated with the model C681 accessort kit. 5. If the output range desired is the full scale range for the output type (e.g. 4-20mA or 2-10V), then set position 5 of SW2 to ON for either of the full scale default output ranges (see Table 4). If configuration of a sub-range is preferred (e.g. 12-20mA or 1-5V), then set position 5 of SW2 to OFF (or open) to enable use of the ranging pushbutton adjustment. Table 1: RTD Type Table 5: Input Type SW2 RTD Type 1 3-Wire 4-Wire SW3 Input Type 1 2 Thermocouple RTD 2 mV or Ohms 2-Wire Key: = 1 = On or Closed Key: = 1 = On or Closed Table 2: Output Type SW2 Output 3 Current Voltage Table 3: Input Range Type* Default Burnout Detection Upscale SW2 4 Output Linear to Temperature SW2 SW2 5 User Defined Key: = 1 = On or Closed 3 4 R J S B T K N C 4 Cu-9.035 Ni-120 067 Pt-100 385 Pt-100 3911 0 to +1760 C +200 to +1760 C +/-1.0 C -210 to +760 C -100 to +760 C +/-0.25 C 0 to +1760 C +400 to +1760 C +/-1.0 C 0 to +1800 C +400 to +1800 C +/-2.0 C +/-0.25 C 5 0 to +2320 C 0 to +2320 C +/-0.5 C -270 to +1000 C -100 to +1000 C +/-0.25 C 6 -200 to +850 C +/-0.15 C -200 to +630 C +/-0.15 C Pt-500 3911 Table 8: Config Mode Pt-500 392 Pt-1000 385 SW3 4 5 6 +/- 90mV +/- 900mV 0 to 4000 Ohms Key: = 1 = ON or Closed Input (A/D) Accuracy +/-0.25 C 3 Input Range +/-0.15 C *Default for Outputs is either 2-10V or 4-20mA. Default for Inputs is the "Input Range" specified in Table 9. Note that if the input or output is set for default, then the input or output calibration will be skipped in the pushbutton programming sequence. +/-0.4 C -40 to +260 C Pt-200 392 By PC 70 to +1300 C -80 to +320 C Pt-500 385 Key: = 1 = On or Closed -270 to +1300 C Key: = 1 = On or Closed +/-0.3 C By DIP Switch 0 to +400 C -100 to +1370 C mV & Ohm Type -270 to +400 C -270 to +1370 C Pt-100 392 8 Input (A/D) Accuracy Pt-200 385 SW2 Accuracy Range SW3 3 Input Range 7 Configuration Mode 6 E 5 On Off Table 4: Output Range Type* T/C Type RTD Type Table 7: Output Linearization User Defined Default 6 Key: = 1 = On or Closed Key: = 1 = On or Closed Output Range SW2 Downscale Key: = 1 = On or Closed Input Range Table 6: Burnout Detection Table 9: Input Select SW3 -200 to +630 C +/-0.15 C -200 to +850 C +/-0.20 C -200 to +630 C +/-0.20 C -200 to +850 C +/-0.20 C -200 to +630 C +/-0.20 C -200 to +630 C +/-0.20 C -200 to +850 C Input Range Accuracy Range +/-0.20 C Input (A/D) Accuracy Minimum Span -90 to +90mV -90 to +90mV +/-12uV 3mV -100 to 900mV -100 to 900mV +/-25uV 3mV 10 to 4000 Ohms 10 to 4000 Ohms +/-1.0 Ohms 10 Ohms Input to Output error at 25C is less than or equal to the Input Accuracy, plus the Linearization Accuracy, plus the Output Accuracy (plus the CJC Error for T/C Inputs). Calibration The Q486 is a microprocessor based circuit with internal references that are factory calibrated to better than 0.000005V. For this reason the Q486 does not need field calibration, but it can be configured (ranged) in the field for virtually any temperature to DC I/O combination. For best results ranging should be performed in the operating installation, allowing at least 30 minutes for thermal equilibrium of the system. If ranging on a test bench is preferred, then an output load equal to the input impedance of the device connected to the output is recommended, along with a 30 minute warm up period. Note: An I/QRail is required to deliver power to the module. See ordering information. 1. After configuring the unit, install the module onto a piece of DIN rail and the I/Q Rail mounting combination. See the I/Q Rail data sheet for details. 2. Connect the input to a calibrated thermocouple simulator or resistance source and the output to a voltage or current meter. Apply power and allow the system to reach thermal equilibrium (approx. 30 minutes). Note: To quit the calibration mode and reset the unit, push the CAL button and hold for more than 5 seconds. Or, wait for more than five minutes and the unit will time-out and automatically reset to the previously stored calibration. 4. Push the CAL button momentarily (the yellow and green LEDs will now be on). 5. Apply the maximum input signal level, then push the CAL button to store. The yellow LED will now be on. 6. Apply the minimum input signal level, then push the CAL button to store. The green and red LEDs will now be on. 7. Adjust the input signal while monitoring the output signal until the output is at the desired maximum level (e.g. 20.00mA), then push the CAL button to store (the red LED will be on). 8. Adjust the input signal while monitoring the output signal until the output is at the desired minimum level (e.g. 4.00mA), then push the CAL button to store (the yellow, green and red LEDs will be on). 9. To finish calibration, push the CAL button once again. The green LED will be on if the input is within the calibrated range. 3. Adjust the input signal to the desired maximum and observe that the green LED is on. Push the CAL button and hold it down for more than 5 seconds (until the yellow and red LEDs are on). Figure 2: RTD Wiring Detail Terminal A1 Figure 1: Q486 Calibration Flow Chart Connection Terminal Connection Current Output (+) C3 RTD Input (-) or Resistance RTD Return A2 Voltage Output (+) C4 A3 Output Common (-) C5 T/C Input (-) or mV (-) A4 PC Interface Return C6 T/C Input (+) or mV (+) A5 TX, Transmit P1 AC Power (Hot) A6 RX, Receive P2 Not Used C1 RTD Sense P3 Not Used C2 RTD Input (+) or Resistance P4 AC Power (Neutral) Specifications Inputs: Sensor Types: see Table 9 Ranges: Any span within the Accuracy Range in Table 9 Impedance: > 1.0M ohms typical for t/c and mV inputs RTD Excitation: < 0.3mA Burnout Detection: upscale or downscale CJC Error: < +0.1C max. (Instant Accuracy ensures the output is within +0.5C of rated accuracy 30 seconds after powering Output: Voltage: Range: 0-10V Drive: 10mA (1000 ohm load min.) Current: Range: 0-20mA Drive: 15V (750 ohms max.) Isolation: 1800VDC or peak AC between input, output and power Configuration: SW1: Pushbutton, input and output ranging SW2: Linearization, Burnout, Output (voltage or current), and initialization mode SW3: Input Type Accuracy: Input (A/D): see Table 9 Linearization: < +0.05% of accuracy range, max. Output: < +10mA for current output < +5mV for voltage output Thermal Stability: CJC: + 0.01C/C change in ambient, max. Zero: + 0.0075% of full scale/C change in ambient, max. Span: + 0.0075% of full scale/C change in ambient, max. Long Term: + 0.1% max. over a 9 month period Response Time: 400mSec, typical. Turn On Time: < 5 seconds to establish output within 99% or 2C of final value or 0.5C within 30 seconds LED Indicator: Power (green): On when power is on, Flashes for t/c burnout Input (yellow): Flashes for out of range (red): Flashes for switch setting error Calibration: 1 green, 1 yellow and 1 red LEDs indicate steps in ranging process Common Mode Rejection: 120dB at DC, > 90dB at 60Hz ESD Susceptibility: Capable of meeting IEC 801-2 level 3 (8kV) Humidity (non-condensing): Operating: 15 to 95% @ 45C Soak: 90% RH for 24 Hours @ 60C Temperature: Operating: -25C to +65C (-13 to 149F) Storage: -25C to +70C (-13 to 158F) Power: 2.5W max., 100 to 240VAC + 10%, 50 to 400Hz Wire Terminal: Socketed screw terminals for 12-22AWG Agency Approvals UL recognized per standard UL508 (File No.E99755). CE Compliance per EMC directive 89/336/EEC and Low Voltage 73/23/EEC. Ordering Information Models & Accessories Specify: 1. Model: Q486-0001 2. Specify I/QRail type and quantity (required) 3. Accessories: (see Accessories) 4. Optional Custom Factory Calibration; specify C620 with desired input and output ranges. Dimensions Accessories ActionI/Q series modules will mount on standard TS32 (model MD02) or TS35 (model MD03) DIN rail. In addition, the following accessories are available: C681-0001 MD02 MD03 IQRL-2002 IQRL-2004 IQRL-2008 C620 PC Adapter & Configuration Software TS32 DIN rail TS35 x 7.5 DIN rail 2 Position I/QRail & DIN rail 4 Position I/QRail & DIN rail 8 Position I/QRail & DIN rail Factory Calibration Factory Assistance Printed on recycled paper For additional information on calibration, operation and installation contact our Technical Services Group: 703-669-1318 Eurotherm, Inc 741-F Miller Drive Leesburg, VA 20175-8993 703-443-0000 info@eurotherm.com or www.eurotherm.com/actionio Action Instruments Barber-Colman actionsupport@eurotherm.com 721-0666-00-N 2/09 Copyright(c) Eurotherm, Inc 2009 Chessell Continental Eurotherm