ACI MSCTA-40 Analog Current Sensors
Analog Output Current Sensor
- MSCTA-40 offers 4 to 20 mA output MSCTE-40 offers 0 to 5 VDC output
- Split-core variant available for all MSCT current sensors
- 0 to 40 amperage sensor range
- Easy installation; DIN rail mountable
The MSCT Analog Current Sensors are designed for use in any AC current monitoring application in which you are looking to monitor a piece of equipment for proper operation.
Accuracy
With the steady decrease in operating currents on today’s equipment, the MSCT Series current sensors have the industry’s highest accuracy. This enables you to better monitor the current used in your applications, as well as make better maintenance decisions to ensure your systems run as efficiently as possible.
Output
The MSCTA-40 is offered in a 2 wire 4-20 mA loop powered output. The MSCTE-40 is offered in a 0-5 VDC output. The MSCT current sensors are available in a split-core version and can monitor up to 40 A.
Design
The MSCT current sensors use an “Average” current measuring method and should be used in applications where a pure Sinusoidal AC waveform that has very little or no distortion/noise on the conductor being monitored. Applications may include monitoring a resistive type load such as an incandescent light bulb or heating element as well as any single speed linear load. For best results, the MSCT current sensors should not be used in applications with switching power supplies or variable speed drives due to the limited operating frequency range.
Installation
The MSCT current sensors can be secured to the monitored cable using a cable tie and the integrated cable tie anchor feature of the housing. The MSCT also comes with an attachable mounting foot that allows the unit to be mounted in any position using one Tek screw or snapped directly on a 35 mm DIN rail.
Applications
Applications include Load Trending, Single Speed Loads, Pumps, Compressors, Fans, Preventative Maintenance, LEED, Project Justification (Calculating ROI), Process Control.
Warranty
The MSCT Current Sensors are covered by ACI’s Five (5) Year Limited Warranty. The warranty can be found in the front of ACI’s Sensors & Transmitters catalog, as well as on ACI’s website workaci.com.
Specifications
Monitored Current Type: AC Current
Maximum AC Voltage: 600 VAC
Isolation Voltage: 2200 VAC
Operating Frequency Range: 50/60 Hz
Core Style: Split-Core
Supply Voltage (MSCTA-40): +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
Supply Current (MSCTA-40): 25 mA minimum
Supply Voltage (MSCTE-40): Induced from the Monitored Conductor (Insulated Conductors only)
Maximum Load Resistance at 24 VDC (MSCTA-40): 775
Ohms (Formula : [24 VDC – 8.5 VDC] / 0.020 A)
Sensor Amperage Range: 40 A
Output Signal: MSCTA-40: 4 to 20 mA (2-Wire, Loop Powered)
MSCTE-40: 0-5 VDC
Response Time:
MSCTA-40: < 600 mS (Rise and Fall Times)
MSCTE-40: < 300 mS (Rise and Fall Times)
Aperture Size (Diameter) 0.20” (5.0 mm) x 0.49” (12.5 mm)
Wire Size: Fits 10 AWG to 14 AWG THHN Insulated Wire
DIN Rail Size: 35 mm
Environmental
Operating Temperature Range¹: MSCTA: -22 to 140 ºF (-30 to
60 ºC) MSCTE: -22 to 122 ºF (-30 to 50 ºC)
Operating Humidity Range: 10 to 95 %, non-condensing
Storage Temperature | Range: -40 to 158 °F (-40 to 70 °C) | 10 % to 95 % RH, non-condensing
Enclosure Material | Flammability Rating: 1PC/ABS (Polycarbonate/ABS Blend) | UL94-V0
Wiring Connections: 2 Position Screw Terminal Block (Polarity Sensitive)
Wire Size: 16 to 22 AWG (1.31 mm2 to 0.33 mm2) 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 switch & other magnetic devices (Relays, Contactors, Transformers)
Mechanical
Dimensions: 1.93″ (48.99 mm) x 1.31″ (33.17 mm) x 2.18″ (55.37 mm)
Weight: 0.165 lbs. (0.075 Kg)
- Maximum 40 °C for 50 Hz operation of MSCTE
Certification
UL/CUL US Listed (UL 508) Ind. Control Equipment (File # E309723), CE, RoHS, UKCA, FCC, CAN ICES-3 / NMB-3
Accuracy Specifications
| Accuracy | Current | Operating Temperature | Frequency | |
| MSCTA-40 | ±0.75 % FS (±0.3 A) | Greater than 2 A | 5 to 140 °F (-15 to 60 °C) | 60 Hz |
| ±0.75 % FS (±0.3 A) | Greater than 2 A | 32 to 140 °F (0 to 60 °C) | 50 Hz | |
| MSCTE-40 | ±0.4 % FS (±0.16 A) | Full Range | 5 to 95 °F (-15 to 35 °C) | 60 Hz |
| ±0.75 % FS (±0.3 A) | Full Range | -22 to 122 °F (-30 to 50 °C) | 60 Hz | |
| ±0.75 % FS (±0.3 A) | Full Range | -22 to 86 °F (-30 to 30 °C) | 50 Hz |
Dimensional Drawing
Side View
Front View
Standard Ordering
| Model Number | Description | AMP Range | Output Signal |
| A/MSCTA-40 | 151890 | 0-40 A | 4 to 20 mA |
| A/MSCTE-40 | 151889 | 0-40 A | 0 to 5 VDC |
The MSCT Current Sensors are not intended to be used in Life / Safety Applications or in Hazardous / Classified locations (environments).
Accessories Ordering
| Item Number |
Description |
| 100307 | 249 Ohm, 1/4 W, ±1 % Tolerance, 50 PPM Resistor (Only Needed to Convert to 1-5 VDC) |
| 100306 | 249 Ohm, 1/4 W, ±0.1 % Tolerance, 50 PPM Resistor (Recommended for Best Accuracy) (Only Needed to Convert to 1-5 VDC) |
| 100469 | 499 Ohm, 1 W, ±1 % Tolerance, 50 PPM Resistor (Only Needed to Convert to 2-10 VDC) |
Customer Support
Improving the world, one measurement at a time.TM
Documents / Resources
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ACI MSCTA-40 Analog Current Sensors [pdf] Instruction Manual MSCTA-40, MSCTE-40, MSCTA-40 Analog Current Sensors, MSCTA-40, Analog Current Sensors, Current Sensors, Sensors |
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ACI MSCTA-40 Analog Current Sensors [pdf] Instructions MSCTA-40, MSCTE-40, MSCTA-40 Analog Current Sensors, MSCTA-40, Analog Current Sensors, Current Sensors, Sensors |
