<6. Wiring>
6-3
IM 01C25F01-01E
6.3.5 Status Output Connection
When option code /AL is specified, connect the
external wiring as shown in Figure 6.5.
To configure and activate the process alarm
function and status output, it is necessary to set
some parameters. Refer to each communication
manual for procedures.
Transmitter
terminal box
Magnetic
valve
AC power supply
External power
supply 30V DC,
120mA max
+
–
250
Ω
24V DC
Use two-wire separately shielded cables.
Distributor
Shielded cable
F0605.ai
Figure 6.8
Status Output Connection
6.4 Wiring
6.4.1 Loop Configuration
Since the DPharp uses a two-wire transmission
system for 4 to 20 mA output, signal wiring is also
used as power wiring.
DC power is required for the transmitter loop. The
transmitter and distributor are connected as shown
below.
For details of the power supply voltage and load
resistance, see section 6.6; for communications line
requirements, see section 9.1.
For 1 to 5 V output, three or four wire system is
used. See (3).
(1) 4 to 20 mA output, General-use Type and
Flameproof Type
Hazardous Location
Nonhazardous Location
Transmitter terminal box
Distributor
(Power supply unit)
Receiver
instrument
F0606.ai
Figure 6.9
Connection between Transmitter and
Distributor
(2) 4 to 20 mA output, Intrinsically Safe Type
With the intrinsically safe type, a safety barrier must
be included in the loop.
Hazardous Location
Nonhazardous Location
Transmitter terminal box
Distributor
(Power supply unit)
Receiver
instrument
Safety barrier
F0607.ai
Figure 6.10 Connection between Transmitter and
Distributor
(3) 1 to 5 V output
Either three or four wire system is used.
Power supply line and 1 to 5 V signal line commonly
use the SUPPLY - terminal.
NOTE
With three wire connection, the cable length may
affect the measurement accuracy of the output
signal.
In either three-wire or four-wire connection,
recommended wiring distance is 200 m or less,
and the use of shielded cable is recommended.
■ Three wire connection
For three wire system, a negative wiring shall be
commonly used for power supply and signal line.
Hazardous Location
Nonhazardous Location
Transmitter terminal box
Distributor
(Power supply unit)
Receiver
instrument
F0617.ai
Figure 6.11 Connection between Transmitter,
Distributer and Receiver
