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CSD Series Current Devices—Split Core
24- 10345- 34, Rev. E
Installation Instructions
CSD-CF0A0-1
CSD-CF0J0-1
CSD-CA1G0-1
Refer to the QuickLIT website for the most up-to-date version of this document.
Part No. 24-10345-34, Rev. E
Issued March 2016
Applications
The Current Switch Device (CSD) Series of digital
output switches are nonintrusive devices designed to
detect current flowing through a cable or wire. A cost
effective solution for monitoring on and off status or
proof of operation, these units are ideal for monitoring
small current loads on motors driving fans and blowers,
heating coils, and lighting.
These units provide a universal solid state output and
do not require a power supply. Completely
self-powered, these units draw their po wer from current
induced from the monitored cable or line.
IMPORTANT: The Current Switch Device (CSD)
Series Current Devices are intended to provide an
input to equipment under normal operating
conditions. Where failure or malfunction of the CSD
could lead to personal injury or property damage to
the controlled equipment or other pr op er ty,
additional precautions must be designed into the
control system. Incorporate and maintain other
devices, such as supervisory or alarm systems or
safety or limit controls, intended to warn of or protect
against failure or malfunction of the CSD.
IMPORTANT : Le Current Switch Device (CSD)
Series Current Devices est destiné à transmettre
des données entrantes à un équipement dans des
conditions normales de fonctionnement. Lorsqu'une
défaillance ou un dysfonctionnement du CSD risque
de provoquer des blessures ou d'endommager
l'équipement contrôlé ou un autre équipement, la
conception du système de contrôle doit intégrer des
dispositifs de protection supplémentaires. Veiller
dans ce cas à intégrer de façon permanente
d'autres dispositifs, tels que des systèmes de
supervision ou d'alarme, ou des dispositifs de
sécurité ou de limitation, ayant une fonction
d'avertissement ou de protection en cas de
défaillance ou de dysfonctionnement du CSD.
IMPORTANT: Install the CSD Series Current
Devices only on the input side of a variable speed
drive. Otherwise excessive wear may occur on the
controlled equipment, as well as premature failure of
the CSD Series Current Devices.
Installation
WARNING: Risk of Electric Shock.
Disconnect the power supply before
making electrical connections. Contact with
components carrying hazardous voltage
can cause electric shock and may result in
severe personal injury or death.
AVERTISSEMENT : Risque de
décharge électrique.
Débrancher l'alimentation avant de réaliser
tout branchement électrique. T out cont act
avec des composants conducteurs de
tensions dangereuses risque d'entraîner
une décharge électrique et de provoquer
des blessures graves, voire mortelles.
WARNING: Risk of Personal Injury.
Do not touch the relay while power is
applied to the relay. The relay surface is
hot during use, and may cause a serious
burn upon contact.
AVERTISSEMENT : Risque de
blessure.
Ne pas toucher le relais lorsque le relais
est sous tension. La surface du relais
devient extrêmement chaude durant son
utilisation et risque de provoquer des
brûlures graves en cas de contact.
CSD Series Current Devices—Split Core Installation Instructions 1
Dimensions
Figure 1: CSD Dimensions, mm (in.)
27 (1-1/16)
Fig:sc_sde
65 (2-9/16)
69 (2-23/32)
Fig:splt_cre_frnt
Figure 2: Model CSD-CF0A0-1/CSD-CF0J0-1
Power
Source
Building Automation
Controller
Heating Element
Fan or Pump
DI
DI
Power
Source
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Figure 3: Model CSD-CA1G0-1
Contactor
DI
Motor
Fan or Pump
Mounting
1. Using the two screws (included), attach the
mounting bracket to the back of the electrical
enclosure.
2. Snap the CSD into place on the mounting bracket.
Wiring
1. Disconnect power to the conductor cable from the
power source.
2. Snap the split core around the power conductor
cable, and close the core until the core snaps shut.
Note: The switch contacts are solid state and they
work just like dry contacts. When the switch is closed,
less than 1 ohm is present; when the switch is open,
more than 1 megohm is present.
5. Calibrate Model CSD-CA1G0-1 (see Setup and
Adjustments).
3. Wire CSD output terminals to the control box
Digital Input (DI) terminal (30 V maximum terminal
voltage).
4. Reconnect the power conductor cable. (For wiring
example, see Figure 2 and Figure 3.)
If the measured current is too low to be detected or
is higher than the maximum current rating of the
CSD, use the following methods to increase or
decrease current.
CSD Series Current Devices—Split Core Installation Instructions2
If Measured Current Is Too Low to Be Dete cted
Figure 4: CSD Shown with Four Turns
Figure 5: CSD with CT Transformer
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Figure 6: Status Open, LED On
Status
Status
Open Setpoint
Closed
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Figure 7: Status Open, LED Off
Status
Status
Open Setpoint
Closed
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Wrap the conductor (wire) through the sensing hole
and around the CSD body to produce multiple turns to
increase the measured current.
Measured current = actual current times the number of
turns (see Figure 4).
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IMPORTANT: Failure to derate the current cap acity
could result in damage to the CSD when using
multiple turns to increase measured current. Use the
the following formula to determine the new
maximum current:
New Maximum Current = CSD Current Rating/
number of turns. For example,
Model CSD-CA1G0-1 with 4 turns = 135 A/4 = 33.8,
new maximum current.
Setup and Adjustments
Calibration
Position the CSD so the status output panel faces you.
Confirm the monitored load (for example, a motor or
heater) is running, and use the following methods to
calibrate the CSD.
Under Current Status Condition (Belt Loss, Coupling Shear, Fan, and Pump Status)
1. Turn the setpoint screw clockwise until the Status
Closed Light-Emitting Diode (LED) turns off and
the Status Open LED turns on.
2. Slowly turn the setpoint screw counterclockwise
until the Status Closed LED turns on and the
Status Open LED turns off.
To Monitor Currents Exceeding the Maximum Current Rating of the CSD
For currents > 135 A (Model CSD-CA1G0-1), > 200 A
(Model CSD-CF0A0-1 or Model CSD-CF0J0-1).
Use a 5 A Current Transformer (CT) to reduce the
current passing through the CSD as shown in Figure 5.
Run the current transformer secondary wire through
the sensing hole. Terminate th e two secondary wires of
the 5 A current transformer to each other, and then
install the 5 A current transformer on the monitored
conductor.
Current > 135 A
3. Turn the setpoint screw an ad ditional 1/4 turn
counterclockwise to create a deadband to prevent
hunting.
The CSD is now calibrated to signal current flows
below normal full load amperes.
Output Status:
• Normal: Output Closed
• Alarm: Output Open
Over Current Status Condition (Locked Rotor, Seized Impeller)
1. Turn the setpoint screw counterclockwise until the
Status Open LED turns off and the Status Closed
LED turns on.
CSD Series Current Devices—Split Core Installation Instructions 3
Note: This is the default factory setting.
Figure 8: Status Closed, LED On
Status
Status
Open Setpoint
Closed
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Figure 9: Status Ope n, LED On
Status
Status
Open Setpoint
Closed
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2. Slowly turn the setpoint screw clockwise until the
Status Closed LED turns off and the Status Open
LED turns on.
3. Turn the setpoint screw an additional 1/4 turn
clockwise to create a deadband to prevent hunting.
The CSD is now calibrated to signal current flows
above normal load amperes.
Output Status:
• Normal: Output Open
• Alarm: Output Closed
Accessories
See Table 1 for acce sso ries .
Table 1: CR-01200-0 and CR-02400-0 Command
Relays
Product Code Product Description
CR-01200-0 12 VAC/VDC Single-Pole,
Single-Throw (SPST), Normally
Open (N.O.) Relay
CR-02400-0 24 VAC/VDC Single-Pole,
Single-Throw (SPST), N.O. Relay
Repair Information
If the CSD Series Current Device fails to operate within
its specifications, replace the unit. For a replacement
CSD, contact the nearest Johnson Controls®
representative.
Troubleshooting
Table 2: Troubleshooting
Symptom Action
CSD solid state output does
not function.
Setpoint screw keeps
turning.
Motor is turned on and switch
does not close.
Verify the maximum amperage range has not been exceeded. Voltages or currents above
the rated levels may damage the CSD.
The setpoint screw has a slip clutch to prevent damage at either end. To return the LED to
its original setting, turn the setpoint screw 20 full turns counterclockwise and start the
calibration procedure again.
Insufficient current to the load leads (for example, a motor or heater) to reach the setpoint
threshold. To turn the switch on, wrap the cable multiple times through the sensing hole
(see Figure 4).
CSD Series Current Devices—Split Core Installation Instructions4
Metasys® and Johnson Controls® are registered trademarks of Johnson Controls, Inc.
All other marks herein are the marks of their respective owners. © 2016 Johnson Controls, Inc.
Building Efficiency
507 E. Michigan Street, Milwaukee, WI 53202
Technical Specifications
Split Core Models CSD-CF0A0-1, CSD-CFOJO-1, and CSD-CA1G0-1
Product Code CSD-CF0A0-1 CSD-CF0J0-1 CSD-CA1G0-1
Amperage Range 0.15–200 A 1.5–200 A 1.25–135 A
Switch Setpoint Fixed Fixed Adjustable
Output Relay No
Actuation Coil No
Switch LED Indication No No Yes
Relay LED Indication No
Trip Setpoint Value 0.15 A 1.5 A 1.25-135 A
Current Switching Mode Under Current Sensing Under Current Sensing Over/Under Current
Sensor Supply Voltage Induced from power conductor cable.
Wire Size 2.1–0.6 mm (12–22 AWG) Diameter Recommended
Status Output Switch Normally Open.
Switch Load Capacity 1 A at 30 VAC/42 VDC Maximum
Isolation Voltage 600 VAC rms
Temperature Range -15 to 60°C (5 to 140°F)
Frequency Range 50/60 Hz
Humidity Range 0–95% Noncondensing
Screw Torque 0.5 N·m (4 lb·in.)
Dimension 69 x 65 x 27 mm (2-23/32 x 2-9/16 x 1-1/16 in.)
Aperture (Sensing Hole) Size 18 x 20 mm Diameter (0.72 x 0.78 in. Diameter)
Compliance United States UL Listed, File E310692, CCN NRNT, Under UL 508, Industrial Control Equipment
Canada UL Listed, File E310692, CCN NRNT7, Under CAN/CSA C22.2 No. 14-M91
Industrial Control Equipment
Europe CE Mark – Johnson Controls, Inc., declares that this product is in compliance with the
essential requirements and other relevant provisions of the EMC Directive and the Low
Voltage Directive.
Shipping Weight 0.16 kg (0.35 lb)
The performance specifications are nominal and conform to acceptable industry standards. For application of conditions beyond these
specifications, consult the local Johnson Controls office. Johnson Controls, Inc. shall not be liable for damages resulting from misapplication or
misuse of its products.
Sensing
European Single Point of Contact: NA/SA Single Point of Contact: APAC Single Point of Contact:
JOHNSON CONTROLS
WESTENDHOF 3
45143 ESSEN
GERMANY
Published in U.S.A. www.johnsoncontrols.com
JOHNSON CONTROLS
507 E MICHIGAN ST
MIL WAUKEE WI 53202
USA
CSD Series Current Devices—Split Core Installation Instructions 5
JOHNSON CONTROLS
C/O CONTROLS PRODUCT
MANAGEMENT
NO. 22 BLOCK D NEW DISTRICT
WUXI JIANGSU PROVINCE 214142
CHINA
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