HEAD OFFICE
: MITSUBISHI DENKI BLDG MARUNOUTI TOKYO 100-8310
TELEX : J24532 CABLE MELCO TOKYO
HIMEJI WORKS : 840, CHIYODA CHO, HIMEJI, JAPAN
Specifications are subject to change without notice
2.2.2 Two-pair Wiring
*1 R is the terminating resistor. Connect the terminating resistor (330
Ω
) between terminals SDA and SDB, and terminals RDA
and RDB.
*2 The shield of the shielded twisted-pair cable must be connected to ground (100
Ω
or less). When using parallel link, ground
both side. When using no protocol or dedicated protocol, ground one side.
*3 Connect terminal FG to each terminal of the programmable controller main body grounded with resistance of 100
Ω
or less.
However, for the computer link unit of the A series programmable controller, see the manual of the computer link unit.
2.2.3 One-pair Wiring
*1 R is the terminating resistor. Connect the terminating resistor (110
Ω
) between terminals RDA and RDB.
*2 The shield of the shielded twisted-pair cable must be connected to ground (100
Ω
or less).
*3 Connect terminal FG to each terminal of the programmable controller main body grounded with resistance of 100
Ω
or less.
However, for the computer link unit of the A series programmable controller, see the manual of the computer link unit.
3. Specifications
3.1 General Specifications
General specifications other than the those-mentioned below are the same as for the FX or FX
2N
series programmable controller.
Items
Description
Dielectric withstand voltage
500 V AC > 1 min, tested between terminals in batch and case
Insulation Resistance
5 M
Ω
> 500 V DC, tested between terminals in batch and case
G rounding of resistance 100
Ω
or less
R *1
R *1
S D A
S D B
R D A
R D B
S D A
S D B
R D A
R D B
S G
S D A
S D B
R D
A
R D
B
LIN K
S G
*3
F G
S D A
S D B
R D A
R D B
S G
*3
F G
R *1
R *1
485P C -IF
F X
2N
-485-B D
F X
(0N )
-485A D P
A series pro gram m able
controllers c om puter link unit
'
LIN K S G
*2
G rounding of resistance 100
Ω
or less
R *1
S D A
S D B
R D A
R D B
S D A
S D B
R D A
R D B
S G
S D A
S D B
R D A
R D B
LIN K
S G
*3
F G
S D A
S D B
R D A
R D B
S G
*3
F G
R *1
LIN K S G
*2
485P C -IF
F X
2N
-485-B D
F X
(0N )
-485A D P
A series pro gram m able
controllers c om puter link unit
3.2 Power Supply Specifications
Note
Use a plug with specifications as shown right.
3.3 Performance Specifications
4. Diagnostics
For diagnostics of computer link, please see FX Communication User’s Manual.
4.1 POWER LED Check
4.2 SD LED and RD LED Check
Check the status of the SD LED and the RD LED.
Items
Description
Power source
5 V DC ± 5%
Current consumption
Max. 260 mA
Items
Description
Transmis-
sion standard
RS232C
Conforming to RS232C
RS485/422
Conforming to RS485 and RS232C
Communication method
Full-duplex communication
transmission
distance
RS232C
Max. 15 m
RS485/422
Max. 500 m
Supported baud rate
300 to 19,200 bps
Isolation
Photo coupler isolation and transformer isolation
(between programmable controller and communication signal)
LED Status
Description
Lit
Power source is OK.
Otherwise
Check power supply unit and connection.
Location
LED Status
Check Point
Sending data form computer to
programmable controller(s).
SD LED is lit
Wiring between computer and 485PC-IF is OK.
SD LED is not lit
Check wiring between computer and 485PC-IF. Check that data has been
sent from computer.
Sending data form programma-
ble controller to computer.
RD LED is lit
Wiring between programmable controller and 485PC-IF is OK.
RD LED is not lit
Check wiring between programmable controller and 485PC-IF. Check set-
ting of programmable controller(s) for computer link.
D im ensions: m m (inches)
φ
5.5(0.22")
φ
2.1(0.08")
9.5 (
0
.37")
Guidelines for the safety of the user and protection of the FX-485PC-IF RS485 Interface Unit
•
This manual has been written to be used by trained and competent personnel. This is defined by the European directives for
machinery, low voltage and EMC.
•
If in doubt at any stage during the installation of the FX-485PC-IF always consult a professional electrical engineer who is qualified
and trained to the local and national standards. If in doubt about the operation or use of the FX-485PC-IF please consult the near-
est Mitsubishi Electric distributor.
•
Under no circumstances will Mitsubishi Electric be liable or responsible for any consequential damage that may arise as a result of
the installation or use of this equipment.
•
All examples and diagrams shown in this manual are intended only as an aid to understanding the text, not to guarantee opera-
tion. Mitsubishi Electric will accept no responsibility for actual use of the product based on these illustrative examples.
•
Owing to the very great variety in possible application of this equipment, you must satisfy yourself as to its suitability for your spe-
cific application.
