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2
The RS232 Auxiliary Interface lines are also available on the 9-pin D-sub male
connector placed inside the housing for a fast and easy connection of a PC to set up
the decoder. The pinout is illustrated in the table below:
Pin
3
7
2
8
5
The RTSAUX and CTSAUX signals control data transmission and synchronize the
connected devices. If the RTS/CTS handshaking protocol is enabled, the DP1200
activates the RTSAUX output to indicate a message is to be transmitted. The
receiving unit activates the CTSAUX input to enable the transmission.
2.4.5
Inputs
There is an input available on the DP1200 decoder relative to the External Trigger.
There is also one more general purpose input, IN1. It can be used in Code Verifier
mode of the Standard Application program, to store the code to be verified (see
"Store verifier HW" in the Winhost Help On Line).
The pinouts are indicated below:
Pin
8
9
10
11
The EXT TRIG inputs are used in the ON-Line Operating mode and tells the system
to scan for a code. The active state of this input is selected in software. Refer to the
WinHost Help On Line.
The yellow LED (Figure B, 2 and Figure 29) is on when the External Trigger forces a
current flow through the EXT TRIG+ and EXT TRIG- pins.
These inputs are optocoupled and can be driven by both an NPN or PNP type
command. The connections are indicated in the following diagrams:
20
Name
TXAUX
RTSAUX
RXAUX
CTSAUX
SGND
Name
Function
EXT TRIG+
External Trigger +
EXT TRIG-
External Trigger -
IN1+
Input 1 +
IN1-
Input 1 -
Function
Transmitted Data
Request To Send
Received Data
Clear To Send
Signal Ground
DP1200
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