Campbell SDS-122, Руководство пользователя

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User Guide
3
4 RX O
5 ME I
6 SDE/PE I
7 CLK/HS I
8 Connected to pin 8 of port B (12V supply)
9 TX I
When the datalogger is in communication mode, pin 5
(ME – Modem Enable) is held high. This line is used by the
SDS-122 to detect communications and prevent switching to the
other port.
Switched Datalogger Port B
Figure 3 Pin Positions for Switched Datalogger Port ‘B’: 9-way Female ‘D’
Type Connector
The switched datalogger port (marked ‘PORT B’ in Figure 1) is a 9-way female
‘D’ type connector, having the following pin configuration:
PIN ABBREVIATION I/O
1 +5V
2 0V
3 RING I
4 RX I
5 ME O
6 SDE/PE O
7 CLK/HS O
8 Connected to pin 8 of the datalogger port (12V supply)
9 TX O
NOTE
5 4 3 2 1
9 8 7 6
SERIAL I/O