Mitsubishi Electric FR-A700 Technical Manual page 90

1.4.30 Wiring and arrangement of RS-485 terminals
(1) RS-485 terminal block
Conforming standard EIA-485 (RS-485)
Transmission format Multidrop link
Communication speed MAX38400bps
Overall length 500m
Connection cable Twisted pair cable (4 pairs)
OPEN
Terminating resistor switch
Factory-set to "OPEN".
Set only the terminating resistor switch of
the remotest inverter to the "100Ω" position.
RDA1 RDB1 RDA2 RDB2
RXD
(RXD1+) (RXD1-) (RXD2+) (RXD2-)
SDA1 SDB1 SDA2 SDB2
TXD
(TXD1+) (TXD1-) (TXD2+) (TXD2-)
P5S SG P5S SG
VCC
(VCC) (GND) (VCC) (GND)
Name
RDA1(RXD1+)
-
RDB1(RXD1 )
RDA2(RXD2+) Inverter receive+ (for branch)
-
RDB2(RXD2 ) Inverter receive
SDA1(TXD1+)
-
SDB1(TXD1 )
SDA2(TXD2+) Inverter send+ (for branch)
-
SDB2(TXD2 ) Inverter send
P5S(VCC) 5V Permissible load current 100mA
SG(GND) Ground (connected to terminal SD)
(2) FR-E7TR RS-485 terminal block
RS-485 terminal can be used instead of a PU
connector connected to a standard control circuit
terminal to perform RS-485 communication. To do this,
attach a control terminal option, FR-E7TR.
Parameters need to be set are the same as ones need
for RS-485 communication with a PU connector.
Refer to page 365 for the detail of initial settings and
specification of RS-485 communication with RS485
terminal.
Terminating resistor switch
Factory-set to "OPEN".
Set only the terminating resistor switch of
the remotest inverter to the "100Ω"
position.
Terminal 2/SG switch
OPEN OPEN
Set terminal 2/SG switch to the right position (ON) to
pass a shielded wire across terminal SG. As a result,
terminal 2 changes to terminal SG. (Note that analog
100 100
input of terminal 2 is made invalid)
4
10
SDA SDB RDA RDB SG SDA SDB RDA RDB SG 2 2
RS-485
communication
SDA SDB RDA RDB RUN FU
SDA SDB RDA RDB RUN FU SE SE
terminal
FM RL RM RH MRS RES SD PC STF
A B C
FR-E7TR
F700
Description
Inverter receive+
-
Inverter receive
-
(for branch)
Inverter send+
-
Inverter send
-
(for branch)
E700
STR SD SD
A700 F700 E700
(A700)(F700)
Name
RDA (2 points) Inverter send+
RDB (2 points) Inverter send-
SDA (2 points) Inverter send+
SDB (2 points) Inverter send-
RS-485 communication common, Analog
SG
common(terminai2, 4)
(3) Connection of RS-485 terminals and wires
common
Loosen the terminal screw and insert the cable into
the terminal.
Wire the stripped cable after twisting it to prevent it
from becoming loose. In addition, do not solder it.
Use a bar terminal as necessary.
Cable stripping length
Screw size M2
0.22N⋅m to 0.25N⋅m
Tightening torque *1
Cable size
0.3mm
Small
Screwdriver
(tip thickness: 0.4mm/tip width: 2.5mm)
*1 Undertightening can cause cable disconnection or
malfunction. Overtightening can cause a short circuit or
malfunction due to damage to the screw or unit.
Information on bar terminals
Introduced products (as of September, 2006)
: Phoenix Contact Co.,Ltd.
Terminal Bar Terminal Model
Screw (with insulation
Size sleeve)
M2 AI 0.5-6WH
Bar terminal crimping tool: CRIMPFOX ZA3
Use shielded or twisted cables for connection to the
control circuit terminals and run them away from the
main and power circuits (including the 200V relay
sequence circuit).
When using the bar terminal (without insulation
sleeve), use care so that the twisted wires do not
come out.
83
SPECIFICATIONS
Description
5mm
2 2
to 0.75mm
flathead screwdriver
Wire
Bar Terminal Model
Size
(without insulation
sleeve)
(mm
A 0.5-6 0.3 to 0.5
(Phoenix Contact Co.,Ltd.)
1
2
)