Yaskawa MP920 Communications Module - Manual (Page 126)

6 217IF Module
6.4.1 RS-232C Interface Cables
6-10
6.4 Cables
This section explains the cable specifications for communications using the 217IF Module.
6.4.1 RS-232C Interface Cables
1. The power system, control system, and electrical system, as well as the transmission system, must
be wired separately.
2. There are two D-sub 9-pin (CN1, CN2) connectors for the RS-232C interface on the 217IF Module.
3. The maximum length of the RS-232C cable is 15 meters. This cable should be as short as possible.
4. The RS-232C interface of the 217IF Module is not isolated. A malfunction may sometimes occur
due to noise from the connected terminals. If noise is a problem, use a shielded cable or a modem to
reduce the noise.
The following table shows the 217IF RS-232C transmission line connections of 217IF Mod-
ule.
Table 6.4 217IF RS-232C Transmission Line Connections
MP920 217IF (CN1, CN2) Cable Connection and Signal
Direction
Remote Station
(D-sub 25-pin)
Signal Name Pin No. Pin No. Signal Name
FG 1 1 FG
SD (TXD) 2 2 SD (TXD)
RD (RXD) 3 3 RD (RXD)
RS 4 4 RS
CS (CTS) 5 5 CS (CTS)
DR (DSR) 6 6 DSR (DR)
SG 7 7 SG
CD 8 8 CD
ER (DTR) 9 20 DTR (ER)
IMPORTANT