Yokogawa EJX930A - Manual (Page 40)

<7. Wiring>
7-3
IM 01C25R01-01E
7.5 Wiring
7.5.1 Loop Configuration
(1) General-use Type and Flameproof Type
• Analog Output
SUPPL Y
PULSE
CHECK ALARM
Hazardous Location Nonhazardous Location
Transmitter terminal box
Distributor
(Power supply unit)
Receiver
instrument
F0706.ai
• Pulse output and Alarm, Status Output or
Simultaneous Analog-Pulse Output
SUPPL Y
PULSE
CHECK ALARM
Hazardous Location Nonhazardous Location
Transmitter terminal box
Distributor
(Power supply unit)
Receiver
instrument
F0707.ai
Receiver
instrument
Figure 7.6 Connection between Transmitter and
Distributor
(2) Intrinsically Safe Type
With the intrinsically safe type, a safety barrier
must be included in the loop. Followings are wiring
examples.
• Analog Output
SUPPL Y
PULSE
CHECK ALARM
Hazardous Location Nonhazardous Location
Transmitter terminal box Receiver instrument
(and power supply) Safety barreir
(Isolation type)
F0708.ai
Anaolg input
Power
supply
• Simultaneous Analog-Pulse Output
SUPPL Y
PULSE
CHECK ALARM
Hazardous Location Nonhazardous Location
Transmitter terminal box
Safety barrier
(Isolated type)
I/O module
F0709.ai
Safety barrier
(Isolated type)
Power
supply
Power
supply
Analog input
Pulse input
Figure 7.7 Connection between Transmitter,
barrier and receiver