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When thermocouple input, please do not use thick wire with good heat
dissipation effect (it is recommended to use wire with cross-sectional area
<0.5mm²), and take care not to make external temperature change as much
as possible (especially the switch of nearby exhaust fan will produce large
temperature change). The resistance of each lead should be less than 10Ω
when inputting platinum resistance (the lead resistance is the same).
3.4.2 Terminal description
Terminal Name
Description
L/+
、
N/-
、
L is the phase end of AC power supply, N is the zero
end of AC power supply, the ground end, + is the
positive end of DC power supply, - is the negative end
of DC power supply, please specify when ordering DC
power supply
Serial communication
interface
RS232C communication interface / serial printing
interface (where pin 2 is RXD instrument signal
receiving terminal, pin 3 is TXD instrument signal
sending terminal, and pin 5 is signal ground terminal)
R1~R6
Relay output interface, specification
1A/250VAC@1A/30VDC
485+
、
485-
RS485 communication interface signal sending end,
receiving end
P+
、
P-
24VDC feed output positive end, negative end, each
group ≤ 60mA
AO+
、
AO-
Positive and negative ends of analog current output
B
、
C
、
D
Sampling signal end, the specific signal wiring see the
relevant wiring diagram
Summary of Contents for HT R71
Page 22: ... 22 4 2 Usage Patterns ...
