. SB152 Series Switch Box Overview: 6-12 channel boxes, fiberglass enclosure The SB152 Switch Box is a common cable termination point for bringing sensor cables into a switch box for routine data collection with portable data collectors .
Mounting Instructions Note: if you have purchased a switch box without cable entries provided, you should add your own entry prior to mounting the switch box . CTC does not recommend putting holes in the top of the enclosure due to access and moisture concerns .
Conduit Entry 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 .
Grounding Ensure the shield ground wire on the SB152 Series Switch Boxes is grounded to earth ground . A. Mounting to Earth Ground When mounting SB152 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 .
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 Sensor Installation Installation of sensors/signal input cable Feed blunt end through the cable entry at the bottom of the enclosure .
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Figure 8. Bottom View Figure 7. Front View Strip outer jacket of cable back 1¼ in . and remove all of the shielding . Separate the internal wires from the shield and twist the shield . Strip red and black insulation back ¼ in . Shield / Drain wire Figure 9.
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Inputs Inputs Sensor Inputs Sensor Inputs Red = Positive Red = Positive Black = Common Black = Common Grey = Shield (Ground) Grey = Shield (Ground) Figure 10. Connecting Cables to Switch Box Insert plug into the appropriate PC board connector and double check to ensure that the cable is going to the correct channel .
Post Installation Testing 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 .
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The following LED Readout indicates the circuit integrity: 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) . Yellow LED: Open Circuit . Indicates one of the following: a .
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Warranty & Refund 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 .