YOKOGAWA DP harp EJX Series - 6 Wiring; Wiring Precautions; Selecting the Wiring Materials; Connections of External Wiring to Terminal Box

<6. Wiring>
6-1
IM 01C25B01-01E
6. Wiring
6.1 Wiring Precautions
IMPORTANT
• Lay wiring as far as possible from electrical
noise sources such as large capacity
transformers, motors, and power supplies.
• Remove the electrical connection dust cap
before wiring.
• All threaded parts must be treated with
waterproongsealant.(Anon-hardening
sealant is recommended.)
• To prevent noise pickup, do not pass signal
and power cables through the same ducts.
• Explosion-protected instruments must
bewiredinaccordancewithspecic
requirements (and, in certain countries,
legal regulations) in order to preserve the
e󰀨ectivenessoftheirexplosion-protected
features.
• The terminal box cover is locked by an
Allen head bolt (a shrouding bolt) on ATEX
ameprooftypetransmitters.Whenthe
shrouding bolt is driven clockwise using
an Allen wrench, it goes in. The cover lock
can then be released and the cover can
be opened by hand. See subsection 8.4
“Disassembly and Reassembly” for details.
• Plug and seal an unused conduit connection.
6.2 Selecting the Wiring
Materials
(a) Use stranded leadwires or cables which are
the same as or better than 600 V grade PVC
insulated wire (JIS C3307) or its equivalent.
(b) Use shielded wires in areas that are susceptible
to electrical noise.
(c) In areas with higher or lower ambient
temperatures, use appropriate wires or cables.
(d) In environment where oils, solvents, corrosive
gases or liquids may be present, use wires or
cables that are resistant to such substances.
(e) It is recommended that crimp-on solderless
terminal lugs (for 4 mm screws) with insulating
sleeves be used for leadwire ends.
6.3 Connections of External
Wiring to Terminal Box
F0613.ai
● Terminal Configuration
1
Terminal
2
Terminal
3
Terminal
Power supply and output terminals
External indicator (ammeter) terminals
*1*2
or
Status contact output terminals
*2
(when /AL is specified)
● Terminal Wiring for 4 to 20 mA output,
F
OUNDATION
Fieldbus type, and
PROFIBUS PA type.
SUPPLY
CHECK
or
ALARM
+
–
+
–
+
–
Ground terminal
1
2
2
2
3
3
F0614.ai
SUPPLY
VOUT
+
–
+
–
● Terminal Wiring for 1 to 5 V output
Ground terminal
Power supply terminals
1 to 5 V DC with HART communication
terminals
1
2
2
3
*1: When using an external indicator or check meter, the
internal resistance must be 10 Ω or less. A check meter
or indicator cannot be connected when /AL option is
specified.
*2: Not available for F
OUNDATION Fieldbus and PROFIBUS
PA communication types.
Figure 6.1 Terminal
6.3.1 Power Supply Wiring Connection
IMPORTANT
Connecting with the commercial AC power
supply will damage the device. Be sure to use
the DC power supply in the predetermined
range.
Connect the power supply wiring to the SUPPLY +
and–terminals.When/ALisspecied,alsoreferto
subsection 6.3.5.