<6. Wiring>
6-3
IM 01C25C01-01E
6.3.4 Check Meter Connection
Available only for 4 to 20mA output type and when
/AL is not specified.
Connect the check meter to the CHECK A (+) and
SUPPLY – terminals. (Use hooks.)
• A 4 to 20 mA DC output signal from the CHECK
A (+) and SUPPLY – terminals.
(Note) Use a check meter whose internal resistance is 10 Ω or
less.
Transmitter terminal box
F0604.ai
Power supply
–
+
Check meter
Figure 6.7
Check Meter Connection
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 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
