CTC Union MX542 User manual

MX542 Mini-MAXX BoxMX542 Mini-MAXX Box
1-2 Channel1-2 Channel
Product ManualProduct Manual

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• Introduction...................................................................3
• Product Description...........................................................3
• Product Dimensions & Diagram................................................4
• Mounting Instructions .........................................................5
• Conduit Entry .................................................................6
• Grounding ....................................................................7
• Installation of Sensor / Signal Input Cable......................................8
• Post Installation Testing ..................................................... 11
• Warranty & Return Information .............................................. 13
T  C

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CTC mini-MAXX Boxes provide a common location for routine data collection with
portable data collectors by bringing sensor cables into 1-4 channel termination
points. CTC mini-MAXX Boxes provide BNC outputs for each channel.
MX542 Overview
The MX542 Series is a powder-coated aluminum junction box that provides
connection of the three-conductor input wiring of up to two dual output vibration
and temperature accelerometers or piezo velocity sensors to a portable data
collection unit. Each sensor is wired to BNC connectors via an internal terminal
strip that is located on the reverse side of the BNC panel. Four connections per
channel are clearly labeled along the terminal strip – signal/power, common and
ground with the shield drain wire earth grounded via the aluminum enclosure.
Each MX42 features a hinged cover door with a snap latch to protect the BNC
connectors when not in use. Located on the inside of the door is a measurement
location card that the user can use to identify and label each BNC connector.
Rated for NEMA 4X (IP66), the box is also resistant to hose directed fluid and
corrosion and is rated for temperatures ranging from -58° to 180° F (-50° to 82°
C). This mini-MAXX box measures 3.54 in. W x 4.53 in. H (89.9 mm W x 115.1 mm
H), allowing it to be installed in many locations.

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Measurement
Location Card
Data
Collector
Access
(BNC)
Figure 1. Dimensions
Figure 2. Diagram
Front View Side View

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Independent stainless steel mounting feet are included with the enclosure. Wall
anchoring screws are not included.
Note: If you have purchased a MX542 box without cable entries provided, you
should add your own entry prior to mounting the termination box. CTC does not
recommend drilling holes in the top of the enclosure as it will cause restricted
access to the wire termination connection points and also allow possible moisture
ingression.
CTC
Mini-MAXX
Box
(Rear View)
Mounting
Holes
0.18 in./4.57 mm
Figure 3. Mounting Bracket Placement

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If you are running conduit to your enclosure, ensure the conduit enters from the
bottom of the enclosure when mounted.
Note: To ensure moisture will not flow into the enclosure, a hole should be drilled
at the lowest point in the conduit to provide drainage for any moisture.
Correct
Figure 4. Conduit Entry for Termination box
Incorrect
Drill Drain
Hole Here

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Ensure the shield ground wire on the MX542 Series Termination Box is grounded
to earth ground.
A. Mounting to Earth Ground
When mounting an MX542 Series Termination box to earth ground (such as
an I-Beam), no additional steps are necessary, as the enclosure is grounded
internally.
Figure 5. Termination Box (MX542) Earth Ground

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B. Mounting to non-grounded structure
When mounting the MAXX box to a non-grounded structure, ensure the shield
ground wire or customer supplied ground wire is tied to a source of earth ground.
Figure 6. Ground Wire Placement
S I
Installation of sensors/signal input cable
1. Feed blunt end through the cable entry at the bottom of the enclosure.
Note: it is recommended that cables are marked on both ends.
For cord grip cable entry, take off the cord grip cover with bushing and run cable
through cord grip cover and into enclosure, then hand tighten cord grip cover to
base.

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1. Strip outer jacket of cable back 1¼ in. and remove all of the shielding.
2. Separate the internal wires from the shield.
3. Strip red, black, and white insulation back ¼ in.
Figure 8. Bottom View
Figure 7. Front View
4. While viewing the rear of the panel, locate the appropriate channel. Using a mini
flathead screwriver, loosen the three screws for the channel and insert the wires
into the termination block. Orientation is as follows:
a. Red insulated conductor wire is connected to (+) Vibration.
b. Black insulated conductor wire is connected to (-).
c. Shield drain wire is connected to ground (GND).
d. White insulated conductor wire is connected to (+) Temperature.
e. Tighten the screw on each wire to hold it in place.
Figure 9. Stripped Wire
(-)
Shield / Drain wire
(+)
(+)

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5. Mark the Measurement Location Card located on the inside front cover with a
description of each measurement location.
Figure 10. Field Wiring for 2-Conductor Sensor Inputs
SENSOR 1 SENSOR 2
E
NSIONS
E
SHEET
Sensor Inputs Red = Positive Vib Black = Common Grey = Shield (Ground) White = Positive Temp
Inputs
SENSOR 1 SENSOR 2
E
NSIONS
E
SHEET
Sensor Inputs
Red = Positive Vib
Black = Common
Grey = Shield (Ground)
White = Positive Temp
Temp 2
Vib 2
Temp 1
Vib 1