Digi HI-700HS, Service Manual, Page: 39 / 324

HI - 700HS service manual - 2 - component parts
2 - 5 Issue 1 02/2020
PC main board - Type LV - 67P - COM 3 & 4
A cable form plugged into the main board (COM 3 & COM 4) is attached to two DB9 connectors which
are mounted beside the Ethernet switch
These COM ports can be
used for an additional
serial interface.
Typically COM 3 is used
for a Sleever interface
COM 4 used for HS servo
indexer unit
Serial port interfaces
Pin Signal Pin Signal
1 DCX 2 RXD
3 TXD 4 DTR
5 GND 6 DSR
7 RTS 8 CTS
9 Set by JP2 10 Key
COM 1 : RS 232 DB9 connector COM 2 : RS 232/422/485 DB9 connector
Pin Signal Pin Signal
1 DCD/422TX -
/485 -
2 RXD/422TX+
/485+
3 TXD/422RX+ 4 DTR/422RX -
5 GND 6 DSR
7 RTS 8 CTS
9 Set by JP1
Note: Use JCSEL1 and JCSEL2 to select
communication mode
- see following page
Pin Signal Pin Signal
1 DCD1 2 RXD1
3 TXD1 4 DTR1
5 GND 6 DSR1
7 RTS1 8 CTS1
9 RI1 10 NC
11 DCD2 12 RXD2
13 TXD2 14 DTR2
15 GND 16 DSR2
17 RTS2 18 CTS2
19 RI2 20 Key
CN_COM3/4, 5/6: RS232 20 - Pin header
Jumper settings Function
1 - 2 5v
3 - 4 12v
5 - 6 RI (Default)
JP1, JP2: COM1, COM2 pin - 9 setting
Effective patterns of connections: 1 - 2 / 3 - 4, 5 - 6
Other may cause damage