Greystone Energy Systems – HVAC Sensors and Transmitters
Instruction Manual for GREYSTONE models including: CS-675 Series Current Sensor, CS-675 Series, Current Sensor, Sensor
CS-675-2 - alpscontrols.com
Index of /Install Notes
File Info : application/pdf, 2 Pages, 113.71KB
DocumentDocumentCurrent Sensor CS-675 Series - Installation Instructions INTRODUCTION The CS-675 series current sensor monitors line current for electrical loads such as pumps, conveyors, machine tools or fans and outputs an analog true RMS 4-20 mA signal to represent the load current. The sensor is loop powered and requires an external 15-30 Vdc power supply. The power supply must be 10 Vdc + (Rload x 20 mA) where Rload is the input resistance of the device measuring the signal. So if Rload is 250 the minimum power supply is 15 Vdc. The measured AC line current can be calculated as Iline = (Iloop 4 mA) x Irange / 16. The device is factory calibrated to < ± 2% FSO and features either three jumper-selectable current ranges or fixed range models The sensors are typically used to monitor motor operation and can be used to determine motor failure, belt loss, machine feed rates or tool wear. *WARNING* · Electric shock hazard, use caution · Disconnect and lock out power before installation · Follow national and local electrical codes · Read and understand these instructions before installing · Installation only by qualified electrical personnel · Do not rely on this device to indicate line power · Only install this device on insulated conductors · Only install on 600 Vac maximum conductors · Do not use this device for life-safety applications · Do not install in hazardous or classified locations · Install this product in a suitable electrical enclosure INSTALLATION · Failure to follow these instructions will result in death or serious injury Read all warnings before beginning. Ensure the selected device has the correct ratings for your application. Set the range jumper to the desired range. See Figure 1. The CS-675-2, 5 & 200 each have one fixed range. See Figure 2. Disconnect and lock out power. Mount the sensor with two screws through the base or snap onto a standard DIN mounting rail. The base has an integrated mounting tab to allow either screw mount to a surface or spring mount to a DIN rail. To mount the device to a flat surface, select an area that will allow side and top access to wire device. Slide the mounting tab in so that both mounting holes are accessible. If predrilling is required, the actual device may be used to mark holes or simply cut out the pattern below in Figure 3. The mounting holes in the base will accommodate up to a #10 size screw (Not supplied). See Figure 3 For DIN rail mounting, first slide the mounting tab to its outer position and then hook the fixed end to the DIN rail and finally the tab end may be snapped onto the rail. The tab may be pulled out slightly to allow easier mounting or to remove the device from the rail. See Figure 4. Figure 4 Place the monitored conductor (must be insulated) through the sensor hole and reconnect. See Figure 5. Observe polarity and wire the output to the controller. Use 14-22 AWG shielded wiring for all connections and do not locate the device wires in the same conduit with wiring used to supply inductive loads such as motors. Figure 1 Figure 2 Range Jumper Selector Jumper Position Legend Low Mid High M M M H H H CS-675-R1 Ranges Low (L) = 0 to 10 Amps Mid (M) = 0 to 20 Amps High (H) = 0 to 50 Amps M + H CS-675-RX Current Sensor 4-20 mA Output 0-XX/XX/XX Amps XXXA/60C Max For low range, remove jumper CS-675-R2 Ranges Low (L) = 0 to 50 Amps Mid (M) = 0 to 100 Amps High (H) = 0 to 150 Amps CS-675-XXX Current Sensor + 4-20 mA Output - 0-XXX Amps XXXA/60C Max CS-675-2/5/200 Ranges No setup is required Figure 3 M + - H Span Adj. Pot. Zero Adj. Pot. IN-GE-CS675XXX-01 Copyright © Greystone Energy Systems, Inc. All Rights Reserved Phone: +1 506 853 3057 Web: www.greystoneenergy.com Page 1 Make all connections in accordance with national and local codes. See Figure 6. Ensure the controller scale matches the sensed range. See specifications for model ranges. Reconnect the power. APPLICATION The CS-675 series are factory calibrated to operate within ±2% of FSO. If field calibration is required or a custom measurement range is desired, simply peel back the top label to expose the calibration pots. See Figure 3 . The adjustment pots set the current zero (4 mA) and span (20 mA) of the device and may be adjusted by about ±20% of FSO. Repeat each adjustment until both are acceptable. Figure 5 For applications with load currents exceeding the sensor current ranges use an external CT to reduce the current to an acceptable value. For example, to measure a 500 Amp load current, use a 500A:5A CT and wrap the CT secondary through the CS-675-5 so the sensor output will be 4-20 mA = 0-500 Amps. For applications with small load currents (such as less than 2 Amps), wrap the monitored conductor through the sensor aperture several times to increase the current measured by the sensor. For example, to measure 0-1 Amp with a CS-675-5, wrap the conductor through the sensor aperture 5 times so the sensor output will be 4-20 mA = 0-1 Amp. 600 Vac max Insulated Conductors Only For external CT or multiple wrap applications, ensure the controller is scaled accordingly to obtain correct readings. For any application with multiple wraps, note that the CS-675 maximum current rating must be divided by the number of wraps. For example, with one wrap the maximum current is 100 Amps for the 50 Amp range, with 5 wraps the maximum current is 100/5 = 20 Amps. Ensure the load current is < 20 Amps or the device may overheat and be damaged. Note: These may not be practical applications, select the correct device for the current range required. SPECIFICATIONS Measurement Range........................CS-675-2: 0-2 Amps CS-675-5: 0-5 Amps CS-675-R1: 0-10/20/50 Amps CS-675-R2: 0-50/100/150 Amps CS-675-200: 0-200 Amps Maximum Input Current .................CS-675-2: 10 Amps continuous CS-675-5: 15 Amps continuous CS-675-R1: 3x range continuous CS-675-R2: 2x range continuous CS-675-200: 250 Amps continuous Accuracy ...............................................CS-675-R1/R2: ±2% FSO (5 to 100% of range) CS-675-2, 5, & 200: ±1% FSO (5 to 100% of range) Signal Output......................................4-20 mA Sensor Power ......................................15 to 30 Vdc (loop-powered) Insulation Class ..................................600 Vac, insulated conductors Frequency ............................................20-400 Hz Response Time ...................................500 mS typical, 0 to 90% Output Load........................................250 typical Maximum Load ..................................>600 @ 24 Vdc Operating Temperature...................-15 to 60°C (5 to 140°F) Operating Humidity .........................5 to 90 %RH non-condensing Terminal Block ....................................14 to 22 AWG Dimensions..........................................67 x 68.6 x 24.1 mm (2.65 x 2.7 x 0.95 in) Sensor Aperture.................................20.3 mm (0.8 in) Enclosure Material.............................ABS/PC, UL94 V-0 Input Current CS-675-2/5 FACTORY CALIBRATED RANGES 5 4 CS-675-5 3 2 CS-675-2 1 Agency Approvals.............................cULus Listed Country of Origin...............................Canada 0 4 8 12 16 20 DIMENSIONS Sensor Output Current 68.6 mm 2.7" Ø 20.3 mm 0.8" 24.1 mm 0.95" 57 mm 2.25" Input Current Input Current Input Current CS-675-R1 FACTORY CALIBRATED RANGES 50 High Range 40 30 20 Mid Range 10 Low Range 0 4 8 12 16 20 Sensor Output Current CS-675-R2 FACTORY CALIBRATED RANGES 150 125 High Range 100 Mid Range 75 50 Low Range 25 0 4 8 12 16 20 Sensor Output Current CS-675-200 FACTORY CALIBRATED RANGES 200 150 100 50 0 4 8 12 16 20 Sensor Output Current PRINTED IN CANADA IN-GE-CS675XXX-01 67 mm 2.65" Range Jumper Selector R1 & R2 Only Copyright © Greystone Energy Systems, Inc. All Rights Reserved Phone: +1 506 853 3057 Web: www.greystoneenergy.com Page 2