YSI WaterLog Series, Owner'S Manual

Page: 17 / 174

RS-232 Ports
Two RS-232 ports are provided to connect to a PC, GOES Transmitter, modem, remote display,
or other standard serial communication equipment. These ports are configured as a DTE type of
device. This means they will plug directly into a modem (DCE type device), but will require a
NULL modem adaptor and possible gender changer if connected to a PC (DTE type device). The
NULL modem cable crosses the communication lines allowing two similar devices to
communicate. The pin out for the RS-232 ports is shown below.
SERIAL PORT PIN-OUT
PIN DIRECTION NAM E
1 Input Data Carrier Detect (DCD)
2 Input Receive Data (RD)
3 Output Transmit Data (TD)
4 Output Data Terminal Ready (DTR)
5 N/A Ground (GND)
6 Input Data Set Ready (DSR)
7 Output Request To Send (RTS)
8 Input Clear To Send (CTS)
9 Input Ring Indicator (RI)
System 5000
Hardware Overview 2-3
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