Samson 3730-3 - Switching Amplifier according to EN 60947-5-6; Establishing Communication

86 EB 8384-3 EN
Mounting and start-up
5.16.2 Switching amplier
according to EN 60947-
5-6
For operation of the limit switches, switching
ampliersmustbeconnectedintheoutput
circuit. They must comply with the limit val-
ues of the output circuits conforming to
EN60947-5-6.
Î Observe the relevant regulations for in-
stallation in hazardous areas.
For applications in safe areas (non-hazard-
ous areas), limit switches can be directly in-
terconnected to the binary input of the PLC in
accordancewithIEC61131.Thisappliesto
the standard operating range for digital in-
putsaccordingtoClause5.2.1.2of
IEC61131-2withtheratedvoltageof
24VDC.
5.16.3 Establishing communica-
tion
Communication between computer and posi-
tioner using an FSK modem or handheld
communicator (if necessary, using an isola-
tionamplier)isbasedontheHART
®
proto-
col.
ViatorFSKmodem
− RS-232 Non-ex Order no. 8812-0130
− PCMCIA Non-ex Order no. 8812-0131
− USB Non-ex Order no. 8812-0132
If the load impedance of the controller or
control station is too low, an isolation ampli-
ermustbeconnectedbetweencontroller
and positioner (interfacing as for positioner
connected in hazardous areas).
If the positioner is used in hazardous areas,
anexplosion-protectedisolationamplier
must to be used.
Using the HART
®
protocol, all connected
controlroomandeldunitscanbead-
dressed individually using a point-to-point
connection or the standard (multidrop) bus.
Point-to-point:
Thebusaddress/pollingaddressmustal-
ways be set to zero (0).
Standard bus (multidrop):
In the standard bus (multidrop) mode, the
positioner follows the analog current signal
(set point) in the same way as for point-to-
point communication. This operating mode
is, for example suitable for split-range oper-
ation of positioners (series connection).
G
+81 -82 +11 -12
+83
-84 +51
-52
A2A3 A1
+41 -42
+31 -32
A
+31 -32
Optional
Optional Optional
24VDC
Solenoid valve
(optional)
mA
Control signal
A3
Fault alarm
A2
Software
A1
Software
optionally
inductive
Limit switches
Analog input x
Leakage
sensor
Position transmitter
with two-wire
transmitter supply
unit
Binary input
Fig.33: Electrical connections
3730-30
3730-31
Connection in safe area
Connection in hazardous area
Controller/
control station
Controller/
control station
Handheld communicator or
second FSK modem
4 to 20 mA
Safe area Hazardous area
Handheld communicator or second
FSK modem (explosion-protected)
Explosion-protected isolation
amplier
Fig.34: Connection with FSK modem