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Pin Assignment
Pin #
RS-232
1
DCD
2
RXD
3
TXD
4
DTR
5
GND
6
DSR
7
RTS
8
CTS
9
*RS-232 mode act as
120ohm DIP
DIP 1
DIP 2
ON
ON
ON
OFF
OFF
ON
OFF
OFF
2.8 Digital Input/Output
JetPort 5804 series provides 4 digital inputs and 2 digital outputs. It allows users to connect the
termination units' 5V TTL digital input/output. JetPort Commander allows you to monitor the status of the
DI and DO, and set the value 0 or 1 to DO. JetPort also provides one data port for user to program DI/O
get and set commands. The logic Low (Value=0) power voltage is 0-0.8V, 0.8V is the max value. The
logic High (Value =1) power voltage is 2-5V, 2V is the min value.
The Digital I/O pin can be pulled high or low, thus the connected
equipments can actively drive these pins high or low. When the digital
output of the connected device pulls high to the digital input pin of 5804,
or program the digital output value of the connected device to high, the
5804 can trigger the value and display 1 (logic high) in the JetPort
Commander. When the connected device pulls low or program to low,
JetPort 5804 Wireless Serial Device Server User's Manual
RS-422
RXD-
RXD+
TXD+
TXD-
GND
RI
DTE
120ohm Termination Configuration
120ohm Terminator for Long Distance 4-wire RS-485/RS-422
---
120ohm Termination for Long Distance 2-wire RS-485
No Termination for RS-232/485 (short distance)
RS-485 (4 wire)
RS-485(2 wire)
RXD-
RXD+
TXD+
TXD-
GND
DATA+
DATA-
GND
16
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