CTC Union SB142 User manual

SB142 Series Switch BoxSB142 Series Switch Box

4-8 Channel4-8 Channel

Product ManualProduct Manual

• 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

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CTC junction box solutions allow for the monitoring of remotely mounted vibration

sensors, which would be otherwise restricted to human access due to safety

considerations.

SB142 Series Switch Box Overview

The SB142 fiberglass switch box is used to convert the three-conductor wiring of

up to 8 remotely installed dual output sensors to two switched BNC connectors

and one output switched two-pin MIL spec connector for portable data collection.

BNC labeled “J1” and the two-pin MIL provide output for vibration and the BNC

labeled “J2” provides output for temperature measurements. Input wiring from

each sensor is connected via quick-connect or screw terminal blocks. Each

terminal block includes input for signal, temperature, common and shield. The

shield drain wire is earth-grounded via a ground stud that is mounted to the

side of the stainless steel enclosure. Optionally, the SB242 can be equipped

with a multi-pin connector for interface with online systems for continuous live

readings. This connection requires a JB905-1A or -2A plug.

A centrally located switch on the enclosure’s panel board determines which

sensor provides output to each BNC and the two-pin MIL connector. A

measurement location card is located on the inside of the enclosure door to

identify each channel.

Rated for NEMA 4X (IP66), the SB242 can withstand harsh environments including

temperatures ranging from -58° to 180°F (-50° to 82°C). The box is also resistant

to hose directed fluid and corrosion. A locking latch is installed on the door

allowing the box to be sealed from the elements when not in use.

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Measurement

Location Card

Two-pin MIL

Output Connector

Switch

Quick

Connect

Option

Screw

Terminal

Option

Optional Online

Expansion Jack

Input Terminal Strip Options

BNC

Output

Connector

Figure 1. Dimensions

Figure 2. Diagram

Side View Rear View

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Attach the enclosed mounting brackets to the switch box at the pre-determined

locations.

Note: If you have purchased a switch box without cable entries provided, you

should add your own entry prior to mounting the enclosure.

Mounting

Holes

0.33 in./8.38 mm

Figure 3. Switch Box Rear View

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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 Switch Box

Incorrect

Drill Drain

Hole Here

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Ensure the shield ground wire on the SB142 Series Switch Boxes is grounded to

earth ground.

A. Mounting to Earth Ground

When mounting SB142 Series Switch boxes to earth ground (such as an I-Beam),

mount the shield ground wire using a mounting bolt through one of the mounting

brackets on the enclosure. See Figure 5 below.

Figure 5. Switch Box (SB102) Ground Lug

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B. Mounting to non-grounded structure

When mounting the switch 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

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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.

1. Strip outer jacket of cable back 1¼ in. - 1½ in. and remove all of the shielding.

2. Strip red and black insulation back ¼ in.

3. Remove each terminal plug from respective channel.

Figure 8. Bottom View

Figure 7. Front View

Figure 9. Stripped Wire

4. Locate the appropriate plug (identified by channel number), remove it, and install

the wires using a small flathead screwdriver. Depress selected position button

to open terminal for respective wire. Push plug back into location. Refer to the

below chart for the correct orientation, based on application.

(-)

Shield / Drain wire

(+)

5. Insert plug into the appropriate PC board connector and double check to ensure

that the cable is going to the correct channel.

6. Mark the Measurement Location Card located on the inside front cover with a

description of each measurement location.

Figure 10. Field Wiring for 3-Conductor Sensor Inputs

CH1

GND 1A

Optional

Remote

Output

Optional

Remote

Output

SENSOR #1

SENSOR #2

GND

SENSOR #3

GND

SENSOR #4

GND

SENSOR #5

GND

SENSOR #6

GND

SENSOR #7

GND

SENSOR #8

GND

CH1CH1CH1

CH1CH1CH1CH1

Inputs Inputs

Note: CTC recommends using 4 conductor cables such as CB105,

CB117, CB119, CB192, CB218, CB618, CB818, or CB819 for

biaxial applications. If using a 3 conductor cable such as CB112,

CB191, CB212, CB512, CB612, or CB812 substitue the red wire for

green.

Table 1. Wiring Instructions for Various Applications

LP400 SERIES DYNAMIC & 4-20 mA VIBRATION

SOCKET A WHITE WIRE VIBRATION (+)

SOCKET B BLACK WIRE COMMON

SOCKET C RED WIRE 4-20 mA (+)

SOCKET GND SHIELD DRAIN SHIELD

TWO SINGLE AXIS VIBRATION ACCELEROMETERS

SOCKET A RED WIRE SENSOR 1 (+)

SOCKET B BLACK WIRE COMMON

SOCKET C RED WIRE SENSOR 2 (+)

SOCKET GND SHIELD DRAIN SHIELD

BIAXIAL VIBRATION - AXIS X & Z

SOCKET A GREEN WIRE AXIS X (+)

SOCKET B BLACK WIRE COMMON

SOCKET C WHITE WIRE AXIS Z (+)

SOCKET GND SHIELD DRAIN SHIELD

DUAL OUTPUT - VIBRATION & TEMPERATURE

SOCKET A RED WIRE VIBRATION (+)

SOCKET B BLACK WIRE COMMON

SOCKET C WHITE WIRE TEMPERATURE (+)

SOCKET GND SHIELD DRAIN SHIELD

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