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1 – Basic Installation Hints and Rules
GROUND THE SYSTEM AND YOURSELF THOROUGHLY: The Mini-Key system contains a number of static
sensitive components that can be damaged by static discharge during installation or regular use. This type of
damage is not covered under Sentex's warranty.
Ground the unit according to Figure 1. During the installation, ground shield wires to the ground screw as required.
Also, try to discharge any static before handling the circuit boards.
Ground
PROVIDE POWER FROM A DEDICATED SOURCE: The outlet into which you will plug the Sentex provided
transformer should each be wired to its own circuit breaker. This will prevent two problems:
1. Other equipment cannot introduce spikes, noise, surges, or dips into the power circuit that will affect the
Mini-Key system.
2. The Mini-Key's operation will not be affected if any other equipment develops a short circuit across the
power line.
DO NOT OVERLOAD THE TERMINAL BLOCKS: To
connect wires to a terminal block, remove the "head"
from the correct terminal and open the screws. Insert
the wire into the correct opening in the front and
tighten the screw until the wire is held snugly. Tug
slightly on the wire to ensure a secure connection.
After inserting all wires into the terminal block, plug it
back onto the pins designated for that block.
READ THE BOARD MARKINGS CAREFULLY: The
connection points are clearly marked on the boards.
Before making any connection, make sure you read
the board markings.
Ground the unit
using
one
methods shown.
12 AWG Copper Wire
12 Feet Max. Distance
Figure 1: Grounding the Unit
Page 2 of 8
Doc 6001051, Rev C
Electrical
Panel
of the
Cold-Water Pipe
Earth
Grounding Rod:
Drive 10 Feet into Earth.
WIRING
TERMINAL BLOCKS
1. Lift Head off
2. Loosen screws.
3. Insert wires.
4. Tighten screws.
5. Replace head
Figure 2: Wiring Terminal Blocks
Metallic
1051F6
terminal pins.
on terminal pins.
1051F3
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