MITSUBISHI ELECTRIC T-60 - Manual (Page 17)

COM1 and COM2 Connectors
COM1 and COM2 are the serial port connectors (DB-9 style, male). The
pin-outs for these connectors are as follows:
These connectors provide connection for serial communications between the
T-60 and a variety of devices. Connections made with this connector are
most commonly referred to as SERIAL PORTS. Examine your application
carefully, and make sure that you have TRANSMIT on the T-60 connected to
the RECEIVE of the device under control, and RECEIVE of the T-60
connected to the TRANSMIT of the device under control.
RS422 and RS485 Communications
The T-60 can communicate via RS422 or RS485 on COM1. When either of
these modes are selected, the RS232 COM1 connector is disabled. To use the
RS422 connections, follow the same conventions outlined for RS232,
connecting outputs on the T-60 to inputs on the device under control, and
inputs on the T-60 to outputs on the device under control. To enable the
RS422 transmitter, refer to the RS422 Statement in the EMERSON EMC
Basic Programming Guide. Figure 7 depicts proper RS422 connections.
Pin: Connection:
Housing SHIELD
2 RS232 RECIEVE (INPUT)
3 RS232TRANSMIT (OUTPUT)
5 SIGNAL GROUND
Table 1
COM1 and COM2 Connectors
Pin-Outs
Figure 6
RS232 Minimum Connections
Installation
System Interconnect
9