Supply Requirement; Grounding; Wiring Procedure - ABB JDF300 Operating Instruction

10 J D F 3 0 0 | F I E L D I N D I C ATO R | O I/ J D F 3 0 0 - E N R E V. B
. . .6 Field indicator wiring
. . .Cable connection
The field indicator can be connected in accordance with the
following configuration:
• Indicator only, i.e. coupled to the field indicator's terminal
block.

Supply requirement

For signal/power connection use twisted, stranded pairs of
wiring no 18 to 22 AWG / 0.8 to 0.35 mm2 OD up to 6200 feet
(1900 m). Longer loops require larger wire. If a shielded
wire is used, the shield should be grounded only at one end,
not both ends. In case of wiring at field indicator end, use the
terminal located inside the housing marked with the
appropriate sign.
The JDF300 Field Indicator is a Bus Powered device with
Fieldbus Foundation output. The two wires of the bus have to
be connected as in the picture.
IMPORTANT
The JDF300 FF is not Polarity Sensitive.
Note. Avoid routing cables with other electrical cables (with
inductive load, etc.) or near large electrical equipment.

Grounding

Field indicator housing should be grounded or earthed in
accordance with national and local electrical codes.
Protective grounding terminals (PE) are available outside and/
or inside the housing. Both ground terminals are electrically
connected and the user can decide which one to use.
The most effective field indicator case grounding method is
direct connection to earth ground with impedance equal or less
of 5 ohm.
Internal ground
termination point
Figure 6 Field indicator grounding
Fieldbus line / Power supply
(polarity independent)
External ground
termination point

Wiring procedure

Follow these steps to wire the field indicator:
• Remove the temporary plastic cap from one of the two
electrical connection ports located at both sides in the
upper part of the field indicator housing.
• These connection ports may have a 1/2 inch internal NPT or
M20 threads. Various adaptors and bushings can be fitted
to these threads to comply with plant wiring (conduit)
standards.
• Remove the housing cover of the "field terminals" side. In
an Explosion-Proof/Flame-Proof installation, do not
remove the field indicator cover when power is applied to
the unit.
• Run the cable through the cable gland and the open port.
• Connect the two bus wires to the + terminal, and the
terminal without taking care of their polarity
• Plug and seal the electrical ports. Make sure that when the
installation has been completed, the electrical ports are
properly sealed against entry of rain and/or corrosive
vapors and gases.
WARNING
Cables, cable glands and unused port plugs must be in
accordance with the intended type of protection (e.g.
intrinsically safe, explosion proof, etc.) and degree of
protection (e.g. IP6x according to IEC EN 60529 or NEMA Type
4x). See also the addendum for "EX SAFETY" ASPECTS AND
"IP" PROTECTION.
In particular, for explosion proof installations, remove the red
temporary plastic caps and plug the unused openings with a
plug certified for explosion containment
• If applicable, install wiring with a drip loop. Arrange the drip
loop so the bottom is lower than the conduit connections and
the field indicator housing.
• Put back the housing cover, turn it to seat O-ring into the
housing and then continue to hand tighten until the cover
contacts the housing metal-to-metal. In Ex-d (Explosion
Proof) installation, lock the cover rotation by turning the set
nut (use the 2mm Allen key supplied with the field indicator).
•
WARNING
A protective grounding connection is absolutely necessary
to insure personnel protection, to protect against surge (in
case of installation of this option) and to prevent explosions
in potentially explosive environment.Installing/Removing the
LCD display.
Integrated lightning protection (optional)
The field indicator housing must be connected using the
grounding terminal (PA), by means of a short connection with
the equipotential bonding. Equipotential bonding (minimum
diameter: 4 mm2 (AWG 12) is required throughout the cable
routing area. In case of field indicator with integrated lightning
protection (optional), the intrinsically safe circuit is connected
to the equipotential bonding for safety reasons.