• Refer to the following table when fabricating the cable on the user side.
Commercially available products (as of February 2015)
Product name
Communication cable
RJ-45 connector
*3
Do not use pins No. 2 and 8 of the communication cable.
5.15.2 Wiring and configuration of RS-485 terminals
RS-485 terminal layout
Terminating resistor switch
Initially-set to "OPEN".
Set only the terminating resistor switch of
the remotest inverter to the "100Ω" position.
P5S
SG
SDA1
SDB1
(VCC)
(GND)
(TXD1+)
(TXD1-)
OPEN
VCC GND
+ TXD
-
VCC GND
+ TXD
-
100Ω
P5S
SG
SDA2
SDB2
(VCC)
(GND)
(TXD2+)
(TXD2-)
Name
RDA1 (RXD1+)
Inverter receive+
RDB1 (RXD1-)
Inverter receive-
RDA2 (RXD2+)
Inverter receive + (for branch)
RDB2 (RXD2-)
Inverter receive - (for branch)
SDA1 (TXD1+)
Inverter send+
SDB1 (TXD1-)
Inverter send-
SDA2 (TXD2+)
Inverter send + (for branch)
SDB2 (TXD2-)
Inverter send - (for branch)
P5S (VCC)
5 V (permissible load current 100 mA)
SG (GND)
Earthing (grounding) (connected to terminal SD)
Connection of RS-485 terminals and wires
• The size of RS-485 terminal block is the same as that of the control circuit terminal block. Refer to
method.
SGLPEV-T (Cat5e/300 m) 24AWG × 4P
5-554720-3
RDA1
RDB1
(RXD1+)
(RXD1-)
+
RXD
-
+
RXD
-
RDA2
RDB2
(RXD2+)
(RXD2-)
Description
Model
*3
Mitsubishi Cable Industries, Ltd.
Tyco Electronics
5.15 (N) Communication operation parameters
1
Manufacturer
2
3
4
5
6
7
8
9
10
page 73
for the wiring
627
5. PARAMETERS