Solid Core and Split Core 4-20 mA
Output Current Sensors
CTS-20; CTP-20
INSTALLATION INSTRUCTIONS
SAFETY
3X
WARNING
For CTS-20 Series current sensors, ensure
that all power sources are disconnected and
locked out before installation as severe injury
or death may result from electrical shock due
to contact with high voltage wires.
CAUTION
This product is not intended to be used for life
or safety applications.
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CAUTION
This product is not intended for use in any
hazardous or classified locations.
M25289
INSTALLATION
Fig. 1. Sensor placed on DIN rail
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 +12 to 30 Vdc external power source.
3X
IMPORTANT
The current switch should be used on insulated
conductors only!
The current sensors may be mounted in any position
using the two (2) #8 x 3/4 in (19 mm) Tek screws and the
mounting holes in the base or snapped directly on to the
1-3/8 in. (35 mm) DIN rail (See Figures 3 and 4). Leave a
minimum distance of 1 in. (25 mm) between the current
sensor and any other magnetic devices such as
contactors and transformers.
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M25290
Fig. 2. Sensor removed from DIN rail
IND.CONT.EQ.
3JHX
62-0245—01
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SOLID CORE AND SPLIT CORE 4-20 MA OUTPUT CURRENT SENSORS
aperture (hole) size of the current sensor is
3/4 in. (19 mm) and will accept a maximum cable
diameter of 350 MCM (17.3 mm).
+
+12-30 VDC
–
+ 4-20 MA SIGNAL INPUT
COMMON
GND (SHIELD)
DC POWER SUPPLY
BUILDING AUTOMATION
SYSTEM
–
+
M23934
Fig. 6. Wiring example
OPERATING SPECIFICATIONS
Max Sensing Current Voltage: 600 Vac
Table 1. Specifications by Product Number
Core
Type
Max. Current Max. Current
a
Product Number
Output
Range
Jumper
Continuous
for 6 secs.
CTS-20-005-AVG-001 Solid
CTS-20-050-AVG-001 Solid
4-20 mA Average
4-20 mA Average
0-5 Amps Fixed None
100 Amps
125 Amps
0-10 Amps
0-20 Amps
0-50 Amps
Low
Middle
High
100 Amps
150 Amps
200 Amps
125 Amps
225 Amps
300 Amps
CTS-20-250-AVG-001 Solid
4-20 mA Average
0-100 Amps
0-200 Amps
0-250 Amps
Low
Middle
High
200 Amps
360 Amps
400 Amps
250 Amps
450 Amps
500 Amps
b
Solid
Solid
4-20 mA True RMS
4-20 mA True RMS
0-5 Amps Fixed None
60 Amps
100 Amps
CTS-20-005-VFD-001
CTS-20-050-VFD-001
b
b
0-10 Amps
0-20 Amps
0-50 Amps
Low
Middle
High
60 Amps
100 Amps
160 Amps
80 Amps
200 Amps
300 Amps
Solid
4-20 mA True RMS
0-100 Amps
0-200 Amps
0-250 Amps
Low
Middle
High
160 Amps
320 Amps
400 Amps
200 Amps
400 Amps
500 Amps
CTS-20-250-VFD-001
CTP-20-005-AVG-001 Split
CTP-20-050-AVG-001 Split
4-20 mA Average
4-20 mA Average
0-5 Amps Fixed None
100 Amps
125 Amps
0-10 Amps
0-20 Amps
0-50 Amps
Low
Middle
High
100 Amps
150 Amps
200 Amps
125 Amps
225 Amps
300 Amps
CTP-20-200-AVG-001 Split
4-20 mA Average
0-100 Amps
0-150 Amps
0-200 Amps
Low
Middle
High
135 Amps
180 Amps
250 Amps
200 Amps
300 Amps
400 Amps
b
Split
Split
4-20 mA True RMS
4-20 mA True RMS
0-5 Amps Fixed None
60 Amps
100 Amps
CTP-20-005-VFD-001
CTP-20-050-VFD-001
b
b
0-10 Amps
0-20 Amps
0-50 Amps
Low
Middle
High
60 Amps
100 Amps
160 Amps
80 Amps
200 Amps
300 Amps
Split
4-20 mA True RMS
0-100 Amps
0-150 Amps
0-200 Amps
Low
Middle
High
135 Amps
180 Amps
250 Amps
200 Amps
300 Amps
400 Amps
CTP-20-200-VFD-001
a
All current sensors are shipped from the factory with the jumper set in the high range.
b
All VFD models have True RMS outputs and should be used with Variable Frequency Drives. Not CE compliant at
this time.
3
62-0245—01
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SOLID CORE AND SPLIT CORE 4-20 MA OUTPUT CURRENT SENSORS
TROUBLESHOOTING
Problem
No reading
Solution
•
Confirm that you have +12 to 30 Vdc in series with the current sensor output terminals
and the analog input of the control panel.
•
•
•
Check the polarity of the circuit.
Verify that the terminals are screwed down, wires are firmly in place.
Disconnect the input to the control panel and then insert a current meter (mA range) in
series with the current sensor output to verify that the circuit is working properly.
Erratic readings
•
•
Verify that the wires are terminated properly.
Check that the +12 to 30 Vdc input is clean. In areas of high RF interference, shielded
cable may be necessary to stabilize signal.
Inaccurate readings
•
If you suspect that the current sensor is not reading within the accuracy specifications,
please contact the factory for assistance.
CURRENT CONVERSION FORMULA
To convert the current sensor output signal to a current
reading.
Current reading = mA output/20 mA x Amp Span.
For example:
For a reading of 4 mA with a 0-250 Amp span:
Current reading = (4 mA/20 mA) x 250 A = 0 Amp.
(0/16) X 250 = 0
NOTE: 4 mA = 0 Amps
20 mA = 250 Amps
Automation and Control Solutions
Honeywell International Inc.
1985 Douglas Drive North
Golden Valley, MN 55422
customer.honeywell.com
Honeywell Limited-Honeywell Limitée
35 Dynamic Drive
Toronto, Ontario M1V 4Z9
® U.S. Registered Trademark
© 2007 Honeywell International Inc.
62-0245—01 C.H. Rev. 06-07
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