Hitachi P1-00041HFEF, Основное руководство

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2-23
Chapter 2 Installation and Wiring
■ Serial communication
(Wiring example)
■
24V power supply input/output
(Wiring example)
•
SP and SN with the same name are internally connected, which are
available for a plurality of wiring.
•
For the use of Modbus communication, refer to the “User’s guide”
to obtain a more detailed description.
•
Connecting DC24V external power supply into the terminal P+ and
P-, permit to change parameters and perform optional
communication without the main power source. Is also allowable
when connecting into the main power supply.
Terminal
label
Terminal name Description Electric characteristics
R
S
4
8
5
c
o
m
m
u
n
ic
a
ti
o
n
S
e
ri
a
l c
o
m
m
u
n
ic
a
ti
o
n
SP
SN
RP
(CM1)
MODBUS
terminal
(RS-485)
SP terminal: RS-485 differ) signal
SN terminal: RS-485 differential(-) signal
RP terminal: Connect to SP through a termination
resistor
CM1 terminal: Connect to the signal ground of
external communication devices.
There are two SP and two SN terminals, which are
connected internally.
The maximum baud rate is 115.2kbps.
Termination resistor (120Ω) integrated
Enabled: RP-SN shorted
Disabled: RP-SN opened
Terminal
label
Terminal name Description Electric characteristics
2
4
V
p
o
w
e
r
su
p
p
ly
P
o
w
e
r
in
p
u
t
P24
24V output
power source
terminal
This terminal supplies DC24V power for contact signals. Max. output 100mA
CM1
Reference
terminal for
24V output
This serves as a 0V reference terminal for contact signal.
This is used also as a common terminal for FM output.
P+
Terminal for
external 24V
input (24V)
Input external DC24V power supply to the inverter.
24V power supply input permit to change parameter
settings and perform optional communication
operations without control power supply.
Allowable input voltage
DC24V±10%
Max. allowable current 1A
P-
Terminal for
external 24V
input (0V)
Connect CM1
Into the SG (signal ground) of
external devices, For enabling the termination
resistor, short-circuit between
RP and SN.
Control circuit terminal
RP SN SP SN SP CM1
Modbus communication
(+) (-)
Power supply
24V terminal
External 24V
terminal
P+ P24 P-
External DC24V power supply
Control circuit terminal