ABB 266HSH, Руководство по эксплуатации, Страница: 15 / 32

2600T Series Pressure transmitters | OI/266/LowP-EN Rev.A 15
6 Transmitter wiring
6.3 Supply requirement
For signal connection use, wiring n
o
18 to 22 AWG / 0.8 to
0.35mm
2
ø up to 164 feet (50 meters). Longer loops require
larger wire. For power connection use, wiring n
o
18 to 22 AWG
/ 0.8 to 0.35mm 2 .
The 1 to 5 V dc output signal and the dc power supply to the
transmitter are separated.
The supply voltage at the transmitter terminals must be
between the limits of 8 and 30 V dc.
For Ex ia approval power supply must not exceed 30 Vdc.
For maximum power supply voltage please refer to the top
identification plate of the transmitter.
6.4 Wiring procedure
Follow these steps to wire the transmitter:
— Remove the temporary plastic cap from one of the two
electrical connection ports located at both sides in the
upper part of the transmitter 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.
See the indication on the label on top of the housing.
In an Explosion-Proof/Flame-Proof installation, do not
remove the transmitter covers when power is applied to
the unit.
— Run the cable through the cable gland and the open port.
— Connect the POWER supply, the positive lead to the
PWR+ terminal, and the negative lead to the
PWR– terminal.
— Connect the signal_out 1-5V, the positive lead to the
Vout/COMM+ terminal and the negative lead to the
PWR– 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.
Warning - General risks. Cable, cable gland and unused port plug
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 4x). See also the
addendum for “EX SAFETY” ASPECTS AND “IP” PROTECTION. In
particular, for explosion proof installation, remove the red temporary
plastic cap and plug the unused opening 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 transmitter 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
instrument).