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VN-Matrix 300 • Technical Data 70
RS-232 Serial I/O (COM1 and COM2)
Function: COM1 – used for low level setup or system recovery.
COM2 – used for cross-network serial communications and
alarm relay.
Connector type: 9-pin D-type (male)
Pin-out details:
View into chassis plug
Connector Shell = Screen
COM 1 connector pin out
Pin Function Pin Function
1 DCD 6 DSR
2 RX (data in) 7 RTS
3 TX (data out) 8 CTS
4 DTR 9 RING
5 Ground
COM 2 connector pin out
Pin Function Pin Function
1 DCD 6 DSR
2 RX (data in) 7 RTS
3 TX (data out) 8 Alarm Relay NC
4 Alarm Relay COM 9 Alarm Relay NO
5 Ground
Mating connector: 9-pin D-type (female) with metal cover
Recommended cable: 6-core plus overall screen (low capacitance),
0.22 mm
2
min. per core.
Maximum cable length: 2.95 meters (9.5 feet).
Comms standard: RS-232
COM1 default setting: Baud: 115200
Bits: 8
Parity: None
Stop Bits: 1
Flow Control: None
COM2 setting:
The default settings are able
to be modified to suit user
requirements for control of
external equipment.
Baud: 115200
Bits: 8
Parity: None
Stop Bits: 1
Flow Control: None