Automation Components, Inc.
2305 Pleasant View Road | Middleton, WI 53562
Phone:
1-888-967-5224 |
Website:
workaci.com
Page 1
Version: 6.0
I0000558
PRECAUTIONS
• 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.
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.
GENERAL INFORMATION
The Miniature Adjustable Current switches are
designed for use in any AC current monitoring
application in which you are looking for an adjustable
current switch to monitor normal operating conditions,
equipment failure or preventative maintenance
scheduling for a particular piece of equipment. The
adjustable current switches should be installed on the
line side of the power to the motor, pump, compressor
or other equipment. The adjustable current status
switches can also be used to determine the run time of
your equipment where you want to know when your
piece of equipment runs and for how long it runs when
logging the contact closures on your building
management system or PLC.
MOUNTING INSTRUCTIONS
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 switches will not require external power, since the power
for the current switch is induced from the conductor being monitored.
The A/MCS-A and A/MSCS-A Current Switches should be used on Insulated Conductors Only! The current
switch may be mounted in any position using the (2) #8 x 3/4” Tek screws and the mounting holes in the base
(see
Figure 2
(p.2)). Leave a minimum distance of 1” (3 cm) between the current switch and any other magnetic
devices such as contactors and transformers.
FIGURE 1:
DIMENSIONS
MINI ADJUSTABLE STATUS
SWITCH SERIES
Installation & Operation Instructions
A/MCS-A, A/MSCS-A
Phone:
1-888-967-5224
Website:
workaci.com
WIRING INSTRUCTIONS
ACI recommends the use of a two conductor 16 to 22 AWG shielded cable or twisted pair copper wire only
for all current switch applications. A maximum wire length of less than 30 meters (98.4 feet) should be
used between the A/MCS-A and A/MSCS-A current switches 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 so as to prevent any chance of shorting. The current
switch output terminals represent a solid-state switch for controlling both AC and DC loads and is not
polarity sensitive. The recommended torque to be used on the terminal block connections is 0.67 Nm or
5.93 in-lbs. The aperture (hole) size of the current switch is 0.53” (1.35 cm) and will accept a 1 AWG
maximum wire diameter.
For applications in which the normal operating current is below the 0.20 Amps (A/MCS-A) or 0.55 Amps
(A/MSCS-A) trip point (See
Figure 3
below), the conductor being monitored may be looped through the
sensor 4 times giving you a total operating current of 4X the original current.
Example:
A small fan operating at 0.2A should be wrapped through the sensor 4 times to give you a total
operating current of 0.8Amps flowing through the A/MCS-A or A/MSCS-A.
Solid-Core
Split-Core
2.51” (63.82mm)
1.99”
(50.48mm)
0.99”
(25.06mm)
2.00” (50.80mm)
1.82” (46.14mm)
2.38”
(60.49mm)
2.65” (67.19mm)
0.99”
(25.06mm)
2.15” (54.49mm)
