Samson S2000 Betriebsanleitung PDF herunterladen (Seite 51)

Solenoid valve (forced venting function)

For positioners fitted with the optional sole

noid valve for the forced venting function, a

voltage of 24 V DC must be connected to

the relevant terminals +81 and –82.

NOTICE

If there is no voltage connected for the sole

noid valve at terminals +81 and –82 or

when the voltage signal is interrupted, the

positioner vents the actuator and does not

respond to the set point.

Observe the switching thresholds specified

in the technical data.

5.2.1 Establishing communication

The communication structure between the

controller, logic solvers (PLC) or automation

system, or between a PC or work station

and the positioner(s) is implemented by a

segment coupler (see Fig. 22) conforming to

PROFIBUS directives.

Explosion-protected versions of

PROFIBUS-PA segment couplers must be

used in hazardous areas.

A maximum of 32 positioners may be oper

ated in parallel over a segment coupler in

one PROFIBUS-PA segment. In hazardous

areas, the number of positioners that can be

connected is reduced.

Each positioner connected in the segment

must be assigned a unique bus address be-

tween 0 and 125 (refer to section 7.10).

EB 8384-4 EN 51

Connections

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Samson S2000 Betriebsanleitung Seite 51