Mitsubishi Electric FR-A806 Instruction Manual page 38

Communication
Terminal
Terminal name
symbol
— PU connector
TXD+
Inverter transmission terminal
TXD-
RXD+
Inverter reception terminal
RXD-
GND
Earthing (grounding)
(SG)
USB A connector
—
USB B connector
Safety stop signal
For the safety stop function, refer to
Terminal
Terminal name
symbol
S1 Safety stop input (Channel 1)
S2 Safety stop input (Channel 2)
Safety stop input terminal
SIC
common
Safety monitor output (open
So (SO)
collector output)
Safety monitor output terminal
SOC
common
With the PU connector, communication can be made through RS-485. (For
connection on a 1:1 basis only)
Conforming standard: EIA-485 (RS-485)
Transmission format: Multidrop link
Communication speed: 4800 to 115200 bps
Wiring length: 500 m
The RS-485 terminals enables the communication by RS-485.
Conforming standard: EIA-485 (RS-485)
Transmission format: Multidrop link
Communication speed: 300 to 115200 bps
Overall length: 500 m
A connector (receptacle)
A USB memory device enables parameter copies
and the trace function.
Mini B connector (receptacle)
Connected to a personal computer via USB to
enable setting, monitoring, test operations of the
inverter by FR Configurator 2.
page 45.
Terminal function description
The terminals S1 and S2 are used for the safety stop input
signal for the safety relay module. The terminals S1 and S2 are
used at the same time (dual channel).
Inverter output is shutoff by shortening/opening between
terminals S1 and SIC, or between S2 and SIC.
In the initial status, terminals S1 and S2 are shorted with the
terminal PC by shorting wires. The terminal SIC is shorted with
the terminal SD. Remove the shorting wires and connect the
safety relay module when using the safety stop function.
Common terminal for terminals S1 and S2.
Indicates the safety stop input signal status.
Switched to LOW when the status is other than the internal
safety circuit failure. Switched to HIGH during the internal safety
circuit failure status.
(LOW is when the open collector output transistor is ON
(conducted). HIGH is when the transistor is OFF (not
conducted).)
Refer to the Safety stop function instruction manual (BCN-
A23228-001) when the signal is switched to HIGH while both
terminals S1 and S2 are open. (Please contact your sales
representative for the manual.)
Common terminal for terminal So (SO).
Terminal function description
Interface: Conforms to USB 1.1
(USB 2.0 full-speed compatible)
Transmission speed: 12 Mbps
(Refer to
INSTALLATION AND WIRING
Control circuit
page 51.)
Rated specification
Input resistance 4.7 k
Input current 4 to 6
mADC (with 24 VDC
input)
—
Permissible load
24 VDC
2
(27 VDC at maximum)
0.1 A
(The voltage drop is 3.4
V at maximum while the
signal is ON.)
—
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