Maple Systems HMC7000 Series - Manual (Page 16)

HMC7000 Series Installation Guide
Phone: 425/745-3229 • Fax: 425/745-3429 • Email: [email protected] • www.maplesystems.com
1010-1042 Page 14 of 22 Rev. 02, 09/25/2013
Communication Ports
The HMC7000 Series supports four types of communication ports.
Serial Ports
COM1 port
The COM1 port supports RS232, RS422 four-wire and RS485 two-wire connections. RS485/RS422 supports multi-drop
network (depending on protocol driver selected):
DE9S female connector
Pin out Diagram COM1:
Pin Number Name Description
1 TX+ RS422 transmit +
2 TXD RS232 transmit
3 RXD RS232 receive
4 RX+ RS422 receive +
5 GND Ground
6 NC No connection
7 NC No connection
8 TX- RS422 transmit -
9 RX- RS422 receive -
Note: for 2 wire RS485, jumper Pins 1 (TX+) and 4 (RX+).
Also jumper Pins 8 (TX-) and 9 (RX-).
COM2 port (HMC7057, HMC7070 models only)
The COM2 port on the HMC7000 Series supports RS232, RS422 four-wire and RS485 two-wire connections. The
RS485/RS422 connection can be used in multi-drop network communications (provided the protocol driver selected
supports this):
DE9S female connector