Kistler-Morse KM Junction Box - Manual (Page 9)

5
www.kistlermorse.com
97-1076-01 Rev. B
V. ELECTRICAL INSTALLATION
WARNING: REMOVE POWER FROM THE UNIT BEFORE INSTALLING, REMOVING, OR MAKING
ADJUSTMENTS
CAUTION: ONLY USE SIKAFLEX 1A POLYURETHANE SEALANT OR DOW CORNING RTV 738 OR
RTV739. OTHER SEALANTS MAY CONTAIN ACETIC ACID, WHICH IS HARMFUL TO SENSORS
AND ELECTRONICS.
GENERAL SAFETY
When using electrical equipment, you should always follow basic safety precautions, including the following:
• The installation and wiring of this product must comply with all national, federal, state, municipal, and
local codes that apply.
• Properly ground the enclosure to an adequate earth ground.
• Do not modify any factory wiring. Connections should only be made to the terminals described in this section.
• All connections to the unit must use conductors with an insulation rating of 300 V minimum, rated for
212º F (105º C), a minimum flammability rating of VW-1, and be of appropriate gauge for the voltage and
current required (see specifications).
• Do not allow moisture to enter the electronics enclosure. Conduit should slope downward from the unit
housing. Install drip loops and seal conduit with silicone rubber product.
DISCONNECT REQUIREMENTS FOR PERMANENTLY INSTALLED EQUIPMENT
A dedicated disconnecting device (circuit breaker) must be provided for the proper installation of the unit. If
independent circuits are used for power input and main relay outputs, individual disconnects are required.
Disconnects must meet the following requirements:
• Located in close proximity to the device
• Easily accessible to the operator
• Appropriately marked as the disconnect for the device and associated circuit
• Sized appropriately to the requirements of the protected circuit (See specifications)
WIRING SENSORS TO THE JUNCTION BOX (HALF BRIDGE: KM MICROCELLS, LCELL, LD2, LD3, LD360)
1. Remove the Junction Box cover.
2. Place a plastic washer on a water-tight fitting. Thread the sensor cable through a cap and water-tight
fitting. Leave an adequate length of cable between the sensor and fitting to provide a drip loop.
3. In the bottom of the Junction Box, locate one of the small holes closest to the terminal being used for
the sensor. Screw the water-tight fitting into the hole.
NOTE: TB3 terminal block has 12 terminals to accomodate up to four sensors (A, B, C and D). Locate the
terminal labeled for the sensor that is being wired.
4. Estimate the required length of cable to the terminal strip; allowing a little extra for strain relief. Cut the
excess cable.