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SPA3-2 installation guide
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RS232 (9W 'D' plug)
A 9W 'D' plug provides RS232 communications to third party devices, this is typically a temperature sensing interface. It provides one
transmit and receive signal as well as CTS and RTS lines for handshaking. DTR indicates to the other device that this device is powered.
Pin
1
2
3
4
5
6
7
8
9
Shell
NOTE: The RS232 interface is configured using the UCCassist software.
Issued 08 2020
Function
Reserved
RX_IN
TX_OUT
DTR_OUT
0 V
Reserved
RTS_OUT
CTS_IN
Reserved
Screen
23
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