Supply Requirement; Wiring Procedure; Grounding - ABB JDF200 Operating Instruction

7.2 6.2 Supply requirement

For signal/power connection use twisted, stranded pairs of
wiring no 18 to 22 AWG / 0.8 to 0.35mm2 ø up to 5,000 feet
(1500 meters). 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 transmitter end, use the
terminal located inside the housing marked with the appropriate
sign.
JDF200 is connected in series with the 4...20 mA loop and
takes its power supply from the loop itself regarless from the
selected connection scheme (as per paragraph 6.1 Cable
connection) . The minimum supply voltage must be
dimensioned considering the voltage drop on the indicator.
The maximum voltage drop on JDF200 is 2,4Vdc at 22mA.
Therefore, the minimum supply voltage from the loop can be
calculated as detailed below:
Min. loop voltage = 2,4Vdc + MinVTx + (Rloop * 22mA)
Where:
MinVTx is the transmitter minimum supply voltage
Rloop is the resistance on the loop (in ohms)
JDF200 field indicator minimum operating current is 3,2mA. In
case of lower currents, the display turns off not impacting the
loop.
Field indicator maximum operating current is 23mA. in case of
higher currents, the display will show 23 mA.
JDF200 can withstand up to 400mA for a short period of time
without damage.
Important. For EX ia and Intrinsically Safe installations, power
supply must not exceed 30 Vdc as well as the values stated
in paragraphs 10.1.1 and 10.1.2.
Note. Avoid routing cables with other electrical cables (with
inductive load, etc.) or near large electrical equipment.

7.3 6.3 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.
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 positive lead to the + terminal, and the
negative lead to the – terminal.
— 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.
12 OI/JDF200-EN Rev. E | 2600T Series
Warning - General risks for JDF200 cable glands.
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).

7.4 6.4 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 it up to the user to 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.
Note. In case of certification for the North America, internal
and external grounding points are properly marked with "G".
Figure 7: Ground connection on field indicator housing
6 Transmitter wiring