CTC Union Mini-MAXX MX502 User manual

MX502 Mini-MAXX EnclosureMX502 Mini-MAXX Enclosure
1-4 Channel1-4 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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I
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 and quick
release terminal blocks.
MX502 Overview
The MX502 Series is a powder-coated aluminum junction box that provides
connection of the two-conductor input wiring of up to four 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. Three connections per channel are clearly labeled along
the terminal strip – positive, negative and ground with the shield drain wire earth
grounded via the aluminum enclosure.
Each MX502 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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M I
Independent stainless steel mounting feet are included on the enclosure. Wall
anchoring screws are not included.
Note: If you have purchased a MX502 box without cable entries provided, you
should add your own entry prior to mounting the termination box. CTC does not
recommend putting 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
Brackets
0.18 in./4.57 mm
Figure 3. Mounting Bracket Placement

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C E
If you are running conduit to your enclosure, ensure the conduit cable entry
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 MX502 Series Termination Box is grounded
to earth ground.
A. Mounting to Earth Ground
When mounting an MX502 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 (MX502) 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
into enclosure, hand tighten cord grip cover to base to prevent damage of cord
grip.

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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 and twist the shield.
3. Strip red and black insulation back ¼ in.
Figure 8. Bottom View
Figure 7. Front View
Figure 9. Stripped Wire
(-)
Shield / Drain wire
(+)
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 (+).
b. Black insulated conductor wire is connected to (-).
c. Shield drain wire is connected to ground (GND).
d. Tighten the screw on each wire to hold it in place.

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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 SENSOR 3 SENSOR 4
E
NSIONS
E
SHEET
Sensor Inputs Red = Positive Black = Common Grey = Shield (Ground)
Inputs
SENSOR 1 SENSOR 2 SENSOR 3 SENSOR 4
E
NSIONS
E
SHEET
Sensor Inputs
Red = Positive
Black = Common
Grey = Shield (Ground)

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P I T
The TM1018 Accelerometer Verification Meter can be used to verify cable
conductivity, sensor location and proper wiring connections. The Verification
Meter will indicate if the sensor, cable and/or junction box is in working condition.
It will also confirm bias voltage of the accelerometer, which will inform you of the
operation of the internal accelerometer amplifier.
Testing Method:
1. Utilizing two personnel, Person A will be located at the Termination Box, while
Person B will be located at the measurement location.
2. Once positioned, Person A will connect the TM1018 to the desired output
channel of the MX502, Person A should observe a “NORMAL” LED reading.
3. Person B disconnects the cable from the accelerometer, and the TM1018 should
respond with an “OPEN” LED. Reconnect the cable to the accelerometer, and
the TM1018 should respond with a “NORMAL” LED.
4. Repeat for each measurement location to verify that accelerometer location is
properly identified at the termination box.
The following LED Readout indicates the circuit integrity:
Figure 11. TM1018 Accelerometer Verication Meter

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1. Green LED: Normal. Indicates proper connection and an output bias will be given,
indicating the health of the sensor (4 – 16 V indicates a healthy accelerometer).
2. Yellow LED: Open Circuit. Indicates one of the following:
a. Cable connector is not connected to accelerometer.
b. Cable is open circuit (broken or not connected @ one end).
c. Accelerometer is not functioning correctly
3. Red LED: Short Circuit. Indicates one of the following:
a. Water or contamination in the connector.
b. Reverse Wiring ((+) and (-) leads are reversed).
c. Wires in termination box or cable connector (+) & (-) are touching.

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W  R
Warranty
All CTC products are backed by our unconditional lifetime warranty. If any CTC
product should ever fail, we will repair or replace it at no charge.
Refund
All stock products qualify for a full refund if returned in new condition within 90
days of shipment. Build to order products qualify for a 50% refund if returned in
new condition within 90 days of shipment. Custom products are quoted and built
specifically to the requirements of the customer, which may include completely
custom product designs or private labeled versions of standard products for
OEM customers. Custom products ordered are non-cancellable, non-returnable
and non-refundable.