YOKOGAWA YTA610 User Manual

<5. Wiring>
5-1
IM 01C50G01-01EN
5. Wiring
5.1 Notes on Wiring
IMPORTANT
• Apply a waterproong sealant to the threads
of the connection port. (It is recommended
that you use non-hardening sealant made of
silicon resin for waterproong.)
• Lay wiring as far away as possible from
electrical noise sources such as large
transformers, motors and power supplies.
• Remove the wiring connection dust-caps
before wiring.
• To prevent electrical noise, the signal cable
and the power cable must not be housed in
the same conduit.
• The terminal box cover is locked by an Allen
head bolt (a shrouding bolt) on ATEX and
IECEx ameproof type transmitters.
When the shrouding bolt is driven clockwise
by an Allen wrench, it is going in and cover
lock is released, and then the cove can
be opened by hands. See Subsection 6.3
“Disassembly and Assembly” for details.
5.2 Loop Construction
The YTA is a two-wire temperature transmitter that
uses the output power supply wiring and signal
wiring alternately.
The transmission loop requires DC power. Connect
the transmitter with the distributor as shown in
Figure 5.1.
For the transmission loop, the load resistance of
the distributor or other instrument to be installed in
the loop and the lead wire must be within the range
shown in Figure 5.2.
For details of communication requirements, refer to
the additional reference materials, IM 01C50T01-
02E “YTA Series HART Communication”
and IM 01C50T03-02E “YTA Series BRAIN
Communication”.
F0501.ai
<Hazardous location> <Nonhazardous location>
+
Output signal
–
Distributor
(power supply unit)
Receiver
Input signal
(thermocouple,
RTD, mV, etc.)
Figure 5.1 Loop Construction (for General-use
Type and Flameproof Type)
600
250
10.5 16.6 25.2 42
Power supply voltage E (V DC)
R=
0.0244
E–10.5
F0502.ai
External
load
resistance
R
(Ω)
Communication
applicable range
for HART
and BRAIN
Figure 5.2 Relation Between Power Supply
Voltage and External Load Resistance
Note: For intrinsic safe explosion-proof type units, the internal
resistance of the safety barrier is also included in the load
resistance.

YOKOGAWA YTA610 Specifications

General

Brand	YOKOGAWA
Model	YTA610
Category	Transmitter
Language	English