Hitachi SH1 Series Basic Manual page 34

Chapter 2
■Serial communication
(Wiring example)
Modbus communication
CM1 SP
(+)
Connect CM1
Into the SG (signal ground) of
external devices,
Terminal
Connect CM1
Terminal name
label
Into the SG (signal ground) of
external devices,
SP
Connect CM1
SN
RP
Into the SG (signal ground) of
(CM1)
external devices,
Connect CM1
Into the SG (signal ground) of
external devices,
■24V power supply input/output
(Wiring example)
Connect CM1
Into the SG (signal ground) of
external devices,
Connect CM1
Into the SG (signal ground) of
external devices,
Connect CM1
Into the SG (signal ground) of
external devices,
Connect CM1
Into the SG (signal ground) of
external devices,
Connect CM1
Terminal
Into the SG (signal ground) of
Terminal name
label
external devices,
24V output
P24 power source
terminal
Connect CM1
Reference
Into the SG (signal ground) of
CM1 terminal for
external devices,
24V output
Terminal for
P+ external 24V
Connect CM1
input (24V)
Into the SG (signal ground) of
Terminal for
external devices,
P- external 24V
input (0V)
Connect CM1
Into the SG (signal ground) of
external devices,
Connect CM1
SN SP SN RP
(-)
For enabling the termination
resistor, short-circuit between
RP and SN.
For enabling the termination
resistor, short-circuit between
SP terminal: RS-485 differential(+) signal
RP and SN.
SN terminal: RS-485 differential(-) signal
RP terminal: Connect to SP through a termination
MODBUS resistor
For enabling the termination
terminal CM1 terminal: Connect to the signal ground of
resistor, short-circuit between
(RS-485) external communication devices.
RP and SN.
There are two SP and two SN terminals, which are
connected internally.
The maximum baud rate is 115.2kbps.
For enabling the termination
resistor, short-circuit between
RP and SN.
For enabling the termination
Control circuit terminal
resistor, short-circuit between
RP and SN.
For enabling the termination
resistor, short-circuit between
RP and SN.
External 24V
Power supply
For enabling the termination
24V terminal
terminal
resistor, short-circuit between
RP and SN.
P24 P+
For enabling the termination
resistor, short-circuit between
RP and SN.
External DC24V power supply
For enabling the termination
resistor, short-circuit between
RP and SN.
This terminal supplies DC24V power for contact signals.
For enabling the termination
resistor, short-circuit between
This serves as a 0V reference terminal for contact signal.
RP and SN.
This is used also as a common terminal for FM output.
Input external DC24V power supply to the inverter.
For enabling the termination
24V power supply input permit to change parameter
resistor, short-circuit between
settings and perform optional communication
RP and SN.
operations without control power supply.
For enabling the termination
resistor, short-circuit between
RP and SN.
For enabling the termination
Control circuit terminal
•
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.
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
P-
when connecting into the main power supply.
Description
2-21
Installation and Wiring
Electric characteristics
Termination resistor (120Ω) integrated
Enabled: RP-SN shorted
Disabled: RP-SN opened
Electric characteristics
Max. output 100mA
Allowable input voltage
DC24V±10%
Max. allowable current 1A