Burkert Type 8619 Manual do Utilizador descarregar pdf (Página 22)

Installation and wiring

7.3.4. Wiring the output module "OUT"

The "OUT" outputs module has two 4-20 mA analogue outputs and two digital outputs. The outputs are galvani-

cally insulated, and therefore voltage free.

I+

I-

I+

I-

T+

T-

T+

T-

0 VDC

12-36 VDC

0 VDC

12-36 VDC

0 VDC

12-36 VDC

0 VDC

2 3 4 5 6 7 8 9

(AO1) (AO2) (DO1) (DO2)

Load 2

Load 1

1st 4-20 mA

input (at external

instrument)

2nd 4-20 mA input (at

external instrument)

digital outputsanalogue outputs

(designation in the configuration menus of the Mx

additional output module)

FE = functional earth

Figure 11 : Wiring the "OUT" output module

7.3.5. Wiring the "pH/ORP" module

• Wire a pH/redox sensor in symmetrical mode to obviate the influence of interference and, in this case,

wire the equipotential electrode (compulsory).

• When the pH/redox sensor is wired in asymmetrical mode, measurement of the pH or the oxidation

reduction potential may drift over time when the equipotential electrode is not wired.

Type 8619

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