Wiring - YOKOGAWA EJX Series User Manual

5.2.5 External Temperature Connection
(for EJX910A and EJX930A)
Connect the RTD cable assembly to the Juck Terminal.
Figure 5.5 External Temperature Connection

5.3 Wiring

5.3.1 Loop Configuration
Since the DPharp uses a two-wire transmission system,
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 5.6.
(1) General-use Type and Flameproof Type
• Analog Output
Hazardous Location
Transmitter terminal box
Figure 5.6 Connection between Transmitter and
Distributor
• Pulse output and Alarm, Status Output or
Simultaneous Analog-Pulse Output
(for EJX910A and EJX930A)
Hazardous Location
Transmitter terminal box
Figure 5.7 Connection between Transmitter and
Distributor
F0505.ai
Nonhazardous Location
Distributor
(Power supply unit)
Receiver
instrument
F0506.ai
Nonhazardous Location
Distributor
(Power supply unit)
Receiver
instrument
Receiver
instrument
F0507.ai
<5. Wiring>
(2) Intrinsically Safe Type
With the intrinsically safe type, a safety barrier must be
included in the loop.
Hazardous Location
Transmitter terminal box
Safety barrier
Figure 5.8 Connection between Transmitter and
Distributor
(3) Intrinsically Safe Type (for EJX910A and
EJX930A)
• Analog Output
Hazardous Location
Transmitter terminal box
Safety barreir
(Isolation type)
• Simultaneous Analog-Pulse Output
Hazardous Location
Transmitter terminal box
Figure 5.9 Connection between Transmitter,
barrier and receiver
30
Nonhazardous Location
Distributor
(Power supply unit)
Receiver
instrument
F0508.ai
Nonhazardous Location
Receiver instrument
(and power supply)
Power
supply
Anaolg input
F0509.ai
Nonhazardous Location
I/O module
Safety barrier
(Isolated type)
Power
supply
Analog input
Power
supply
Pulse input
Safety barrier
(Isolated type)
IM 01C25A01-01E
F0510.ai