ABB TB82PH Betriebsanleitung PDF herunterladen (Seite 8)

I-E67-TB82FF-2A February 13, 2002

ELECTRICAL CONNECTIONS

The bus powers the transmitter; thus, power and

fieldbus signals share the same pair of wires.

Separate conduit for power and sensor wiring is

encouraged. Prior to entering the instrument housing,

terminate rigid conduit and install a short length of

flexible conduit to reduce stress to the housing.

Signal wiring must not come in close proximity to

high-power equipment or to cabling from such

equipment. Wiring must be in accordance to the

applicable local codes and fieldbus requirements (see

Supplementary Documentation). Bus cabling must

conform to IEC 61158-2.

The terminal blocks located in the rear of the

transmitter accept wire sizes from 12 to 24 AWG.

Pin-style terminals should be used for all connections.

The terminal block label identifies all electrical

connections and should be followed when wiring the

transmitter. Observance to polarity is not required;

however, polarity indications have been provided for

consistence. Voltage requirements are listed in the

Specifications and must be observed. Ensure the

power supply that provides bus power is complaint

with IEC 61158-2.

Normal grounding practice is to terminate all grounds

in the control room side, in which case the field side of

the screen should be adequately protected to avoid

contact with metallic objects. For bus-powered

systems, the grounding of the shield should be close

to the power supply unit. For IS systems, the

grounding should be at the safety barrier earth

connection. The transmitter case should be grounded.

Ground connections are provided internally (in the

terminal compartment) and externally.

REAR VIEW

POWER/OUTPUT

CONNECTIONS

TB2

TB1

SIGNAL

DRIVE1

SENSE

4DRIVE

RTD

RTD6

SHIELD

INTERNAL GROUND

TERMINALS

EXTERNAL

GROUND

TERMINAL

SENSOR CABLE TO

BE SEALED IN CONDUIT

VOLTAGE AT POWER

TERMINALS TB1-1

AND TB1-2 MUST BE

BETWEEN 9 AND 32 VDC.

CABLING TO CONFORM

WITH IEC 61158-2.

FIELDBUS

Green

Red

Black

Blue

White

Yellow

TERMINAL

COLOR

CODE

FUNCTION

TB2-1

TB2-2

TB2-3

TB2-4

TB2-5

TB2-6

TB2-7

TB2-8

Drive

Sense

RTD

SHIELD

FOR

82EC

ONLY

FOR

82EC

ONLY

Figure 9 – Sensor and Power Wiring

Warning.

Use this equipment only in those classes of

hazardous locations listed on the nameplate.

Uses in other hazardous locations can lead to

unsafe conditions that can injure personnel and

damage equipment.

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