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Current Sensors
Model CU-850/860/870/880
CU-855/865/875/885
• Available in two transformer core
configurations: solid or split-core for ease
....of installation
• Self powered, no external power supply
required for VDC output units
• Two output options are available:
....0-5 VDC or 4-20mA
• Three field selectable ranges in each unit
• UL listed and CE certified
• True RMS measurement
• Up to 200 amp range
RoHS
CU series Current Sensors provide a reliable and low cost solution to monitor
current of supply/exhaust fans, pumps, compressors, unit ventilators, lighting
or any equipment. Current Sensors are available with a solid core or split core
configuration for ease of installation. Two models are available with field
selectable ranges to cover 10 amps to 200 amps full scale. The current sensors
incorporate sophisticated electronics to provide true RMS measurement from
20 to 100 Hz frequency. The VDC output sensor is self powered and does not
require external power. The 4-20 mA sensor is 2-wire loop powered and can
handle 15-40 VDC. 5 year warranty, UL listed, CE certified and the lowest cost
in the industry are some of the features which make the sensors an ideal solution for load status monitoring and alarming functions.
DN850.1
® Registered trademark MAMAC SYSTEMS, Inc.
© Copyright 2013
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SPECIFICATIONS:
CU-850/860/870/880
CU-855/865/875/885
Supply Voltage: Self-Powered (0-5 VDC output)
15-40 VDC (4-20mA output)
Accuracy: +/- 1% FS
Housing: UL 94-V-0 Flame retardant ABS Plastic
Isolation Voltage: 1000 VAC
Termination: Terminal Block 14 Ga max
Frequency Range: 20-100 Hz
Response Time: 250 ms (0-90%)
Operating Temp: 32°
Environmental: 0-95% RH, Non-Condensing
–158°F (0–70°C)
Weight: .25 lbs ( .11 kg)
Agency Approvals: UL listed, CE certified
Max. Input Current: 10/20/50 amp range - 80/120/200 amps continuous
50/100/200 amp range - 175/300/400 amps continuous
CONFORMANCE & TESTING:
RoHS Compliant
EMC Testing:
BS EN 55022:1998, BS EN 55024:1998,
EN 61000-3-3, EN 61000-4-2,
EN 61000-4-3, EN 61000-4-4,
EN 61000-4-5, EN 61000-4-6,
EN 61000-4-11
ORDERING INFORMATION:
Model Description
CU-850
CU-855
CU-860
CU-865
CU-870
CU-875
CU-880
CU-885
CAUTION: Do not use in explosive/hazardous environment.
Solid-core, 10 / 20 / 50 amps, 0 - 5 VDC output
Split-core, 10 / 20 / 50 amps, 0 - 5 VDC output
Solid-core, 100 / 150 / 200 amps, 0 - 5 VDC output
Split-core, 100 / 150 / 200 amps, 0 - 5 VDC output
Solid-core, 10 / 20 / 50 amps, 4 - 20 mA output
Split-core, 10 / 20 / 50 amps, 4 - 20 mA output
Solid-core, 100 / 150 / 200 amps, 4 - 20 mA output
Split-core, 100 / 150 / 200 amps, 4 - 20 mA output
DN850.1
2
® Registered trademark MAMAC SYSTEMS, Inc.
© Copyright 2013
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1.00"
(25 mm)
.50"
(13 mm)
2.90" (74 mm)
Range Jumper
2.50" (63 mm)
CU-850/860/870/880
CU-855/865/875/885
CU-850/860/870/880
Solid Core
0.70"
(18 mm)
.50"
(13 mm)
1.15"
(29 mm)
0.85"
(22 mm)
1.25"
(32 mm)
3.50" (89 mm)
0.75"
(19 mm)
2.45"
(62 mm)
1.25" (32 mm)
0.60"
(15 mm)
3.50" (89 mm)
Range Jumper
2.75" (70 mm)
CU-855/865/875/885
Split Core
0.85" (22 mm)
2x 0.20" Thru
0.65" (17 mm)
2.50" (64 mm)
0.85" (22 mm)
4.00" (102 mm)
DN850.1
3
® Registered trademark MAMAC SYSTEMS, Inc.
© Copyright 2013
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CU-850/860/870/880
CU-855/865/875/885
MAMAC Systems is the leading global manufacturer of sensors, transducers, control peripherals
and web browser based IP appliances. MAMAC products are used for HVAC and environmental
controls, remote monitoring, alarming, energy metering and industrial automation.
All MAMAC products are manufactured in the USA.
WARRANTY: MAMAC Systems, Inc. and its subsidiaries (hereinafter referred to as MAMAC Systems) warrants its
products to be free of defects in material and workmanship for a period of five (5) years from date of shipment. If a
unit is malfunctioning, it must be returned to the factory for evaluation. A return authorization number (RMA) will be
issued by the customer service department and this number must be written or prominently displayed on the shipping
boxes and all related documents. The defective part should be shipped freight pre-paid to the factory. Upon examination by MAMAC Systems, if the unit is found to be defective, it will be repaired or replaced at no charge to the
customer. However, this warranty is void if the unit shows evidence of being tampered with, damaged during installation, misapplied, misused, or used in any other operating condition outside of the unit’s published specifications.
MAMAC Systems makes no other warranties or representations of any kind whatsoever, expressed or
implied, except that of title. All implied warranties including any warranty of merchantability and
fitness for a particular purpose are hereby disclaimed. User is responsible to determine suitability for
intended use.
LIMITATIONS OF LIABILITY: The remedies of buyer set forth herein are exclusive and the total liability of
MAMAC Systems with respect to this order, whether based on contract, warranty, negligence, indemnification, strict
liability or otherwise, shall not exceed the purchase price of the product upon which liability is based. In no event
shall MAMAC Systems be liable for consequential, incidental or special damages. MAMAC Systems
reserves the right to change any specifications without notice to improve performance, reliability, or function of our
products.
Every precaution for accuracy has been taken in the preparation of this manual, however, MAMAC Systems neither
assumes responsibility for any omissions or errors that may appear nor assumes liability for any damages that result
from the use of the product in accordance with the information contained in the manual.
DN850.1
® Registered trademark MAMAC SYSTEMS, Inc.
© Copyright 2013
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