
4.3 Grounding the Power and Data Lines
Each cable has a set of drain lines that can be attached on the Host or controller end of the cable
to any screws mounted in the optional enclosures. If other non-metallic enclosures are used for
controller housing, ensure that an alternative source for earth grounding is available.
4.3.1 Procedure
1. At the Reader side, it is important to be aware of both the static generated from the user end
as well as electrical grounding from the data and power cabling. If at all possible, the reader
mounting plate should be attached to a grounded junction box or to another source, if the
junction box is non-metallic. This alleviates the possible damage caused by static electricity.
NOTE Leave the drain line taped back and floating at the reader site.
2. If grounding locally is not possible, connect drain wires to provided ESD (Electro Static
Discharge) hardware at the Controller side (enclosure) or to earth grounded conduit. As each
reader port is progressively farther away from the ESD hardware location (left rear side of the
cabinet for IQ-400s), allow for enough drain line to reach the ESD hardware on the controller
end of the cable. Allow enough strain relief to avoid touching other circuitry or creating
excessive tension.
3. On a permanently-connected product, a terminal intended solely for the connection of an
equipment grounding conductor shall be capable of securing a conductor of the size suitable
for the particular application in accordance with the National Electrical Code, ANSI/NFPA
70-1993.
4. On a permanently-connected product, a wire binding screw intended for the connection of an
equipment grounding conductor shall have a green colored head that is hexagonal, slotted, or
both. A pressure wire connector intended for connection of such a conductor shall be plainly
identified such as by being marked “G” “GR,” “GROUND,” or “GROUNDING,” or the like, or
by a marking on a wiring diagram provided on the product. The wire binding screw or
pressure wire connector shall be secured to the frame or enclosure of the product and shall
be located so that it is unlikely to be removed during service operations such as replacing
fuses, resetting manual-reset devices, or the like.
5. If a pressure wire connector intended for grounding is located where it could be mistaken for
a neutral conductor of a ground supply, it shall be identified by a marking ²EQUIPMENT
GROUND² or with a green color identification, or both.
6. On a permanently-connected product, the surface of an insulated lead intended solely for the
connection of an equipment grounding conductor shall be finished in a continuous green
color or a continuous green color with one or more yellow stripes, and no other lead shall be
so identified
Page xii of 110 IQ-400 Installation Manual 33-10057-001-C
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