Yokogawa YTA320 - Manual (Page 25)

<5. Wiring>
5-2
IM 01C50B01-01E
When a thermocouple is used as the temperature
sensor, a compensation wire must be used that
it appropriate for the type of thermocouple (refer
to compensating cables for JIS C 1610/IEC584-3
thermocouples). When a resistance temperature
sensor (RTD) is used as the temperature sensor,
2-core/3-core/4-core cable must be used (refer
to resistance thermometer sensor JIS C 1604/
IEC751). The terminal of the dedicated cable is a 4
mm screw.
5.3.2 Output Signal Cable Selection
• With regard to the type of wire to be used
for wiring, use twisted wires or cables with
performance equivalent of 600V vinyl insulated
cable (JIS C3307).
• For wiring in areas susceptible to electrical
noise, use shielded wires.
• For wiring in high or low temperature areas, use
wires or cables suitable for such temperatures.
• For use in an atmosphere where harmful gases
or liquids, oil, or solvents are present, use wires
or cables made of materials resistant to those
substances.
• It is recommended that a self-sealing terminal
with insulation sleeve (4-mm screw) be used for
lead wire ends.
WARNING
If the YTA is TIIS flameproof and the ambient
temperature is 50°C or more, use an external
cable having a maximum allowable heat
resistance of at least 70°C in consideration of
the instrument’s generation of heat or the cable’s
self-heating.
5.4 Cable and Terminal
Connections
5.4. Input Terminal Connections
NOTE
It is recommended that the terminals be
connected in the order of input terminal (1) and
output terminal (2).
CAUTION
When wiring, pay attention not to damage the
cable and cores. All the cores of the cable must
have the sufficient insulation around them.
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a. Cable connection to thermometer resistor(RTD), 3-wire
b. Power supply cable connection
STEP 1
(1)
STEP 2
(2)
Figure 5.4 Terminal Connection Pro cedure
 The temperature sensor is to be
connected as shown in Figures 5.6 and
5.7.
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Figure 5.5 Terminal diagram