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Solid Core and Split Core 4-20 mA
Output Current Sensors
CTS-A AND CTP-A SERIES
INSTALLATION INSTRUCTIONS
APPLICATION
Operating Temperature Range: 5 to 104ºF (-15 to 40ºC)
Operating Humidity Range: 0 to 95%, non-condensing
The 4-20 mA Output Analog Current Sensors are designed for use in any AC current monitoring application in which you are looking to monitor a particular piece of equipment.
SPECIFICATIONS
Monitored Current Type: AC Current
Maximum AC Voltage: 600 VAC
Isolation Voltage: 2200 VAC
Supply Voltage:
+8.5 to 30 VDC (Reverse Polarity Protected) 250 Ohm Load (1-5 VDC): +13.5 to 30 VDC 500 Ohm Load (2-10 VDC): +18.5 to 30 VDC
Wire Recommendations: 2 Conductor (Shielded Cable)
Wire Size:
18 to 24 AWG (0.823 mm2 to 0.205 mm) Copper Wires only
Terminal Block Torque Rating: 4.43 to 5.31 in-lbs. (0.5 to 0.6 Nm)
Minimum Mounting Distance:
1” (2.6 cm) between current sensor & other magnetic devices (Relays, Contactors, Transformers)
Agency Approvals:
CE (-RMS Versions): CE to IEC 61326-1: 2012 Class A, UL/CUL US Listed (UL 508) Ind. Control Equipment (File # E309723), RoHS2, WEEE
STANDARD ORDERING
Table 1. Standard Ordering.
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Output |
Model # |
Selectable Ranges |
Measurement |
AC Waveform |
Solid-Core |
Split-Core |
Signal |
CTS-A-250 |
0 to 100/200/250A |
Average |
Pure Sinusoidal |
• |
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4 to 20 mA |
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CTP-A-200 |
0 to 100/150/200A |
Average |
Pure Sinusoidal |
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• |
4 to 20 mA |
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CTP-A-50-RMS |
0 to 10/20/50A |
True RMS |
Distorted & Pure |
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4 to 20 mA |
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Sinusoidal |
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NOTE: The 4-20 mA Output Current Sensors are not intended to be used in life/safety applications or in hazardous/classified locations.
20
31-00142-01
SOLID CORE AND SPLIT CORE 4-20 MA OUTPUT CURRENT SENSORS
PLEASE READ INSTRUCTIONS CAREFULLY BEFORE INSTALLATION!
WARNING
•This product is not intended to be used for Life or Safety applications.
•This product is not intended for use in any hazardous or classified locations.
•The CTS-A and CTP-A Series Current Sensors must be used on Insulated Conductors Only!
WARNING
HIGH VOLTAGE
Disconnect and lock out all power sources before installation as severe injury or death may result from electrical shock due to contact with high voltage wires.
INSTALLATION
Make sure that all installations are in compliance with all national and local electrical codes. Only qualified individuals that are familiar with codes, standards, and proper safety procedures for high-voltage installations should attempt installation. The current sensor is a 2-wire, 4 to 20 mA Loop Powered device that requires a regulated +13.5 to 30VDC external power source.
The current sensor may be mounted in any position using the two #8 x ¾” Tek screws and the mounting holes in the base, or snapped directly on to the 35mm DIN rail (See Fig. 1. Leave a minimum distance of 1” (3 cm) between the current sensor and any other magnetic devices such as contactors and transformers.
CAUTION
Mating surfaces of the magnetic core are exposed when the sensor is open. Electrical contact grease, present on the cores to prevent corrosion, can capture grit and dirt if care is not exercised. Operation can be impaired if anything prevents good contact between pole pieces. Visually check the mating parts of the core before closing the current sensor.
M37379
Fig. 2. Opening Split Core Models.
CURRENT SENSOR SETUP
The amperage range selected represents the maximum current that can be applied to the conductor being monitored. DO NOT EXCEED! All current sensors with selectable ranges will have the range selection jumper factory set on the high range. For models with field selectable amperage ranges, select the correct amperage range using the range selection jumper. Note that all RMS models have True RMS outputs and should be used with Variable Frequency Drives.
M37378
Fig. 1. Sensor Placed On Rail.
Latch Operation for CTP-A Series
Press down on the side tab and swing the top of the unit up to open the split core current sensor as shown in Fig. 2. Press down firmly on the cover to close the current sensor. An audible “click” will be heard as the tab slides over the tongue on the base.
WIRING
We recommend the use of a two conductor 16 to 22 AWG shielded cable, COPPER WIRE ONLY, for all 4 to 20mA current sensor installations. A maximum wire length of less than 30 meters (98.4 feet) should be used between the current sensors and the Building Management System or controller.
NOTE: When using a shielded cable, be sure to connect only (1) end of the shield to ground at the controller. Connecting both ends of the shield to ground may cause a ground loop.
When removing the shield from the sensor end, make sure to properly trim the shield to prevent any chance of shorting. The current sensor terminals are polarity sensitive and represent a linear and proportional 4 to 20mA output signal. The current sensors are available in either an Average or True RMS output version. Tighten the screws at the terminal block connections to the recommended torque of 0.5 to 0.6 Nm (4.43 to 5.31 inlbs.). The aperture (hole) size of the current sensor is 0.75” (1.90 cm).
31-00142—01 |
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