Sutron Corporation X-Link Operations & Maintenance Manual, Rev 1.63 5/24/2016 pg. 13
be connected to #10, + SW Power and #9 GND. For measurement setup, see the
wind speed section. (See page 100.)
1.7.5.
Digital Inputs
WS/DIG IN 1 and TB/DIG IN 2 are also general purpose digital inputs capable of
making counter, frequency, period, or level measurements. The maximum
frequency of any digital input is 10Khz.
1.7.6.
Analog Connections
The terminal has connections for five analog inputs.
The inputs labeled Analog A and Analog B are for 0-5V sensors.
The inputs labeled Analog C, and Analog D s/-39mv, +/-312mV or +/-
2.5V sensors.
There is a separate connection for 4-20ma sensors.
Detailed notes describing how to connect sensors to the terminal blocks are
provided in the Setup section of this manual, beginning on page 68.
1.7.7.
RS-485
X-Link can use the RS-485 connection in two ways: SDI-12 and Modbus.
1.7.7.1.
Modbus over RS-485
X-Link can function as a Modbus slave. In this mode, it can provide
measurement results, log file access, and more. Please see page 169 for details.
1.7.7.2.
SDI-12 over RS-485
Sutron products such as the CF Bubbler support this connection. SDI-12 over RS-
485 is generally used to allow longer cable lengths.
RS-485 does NOT provide power to the sensor. Do not forget to provide
appropriate power to the sensor!
1.7.8.
Outputs
The following output capability exists in the X-Link product.
1.7.8.1.
Digital Output
On Terminal #11 is the digital output (DOUT). It is an open collector switch. The
switch can be turned on and off manually (by issuing a command via LinkComm
or via a cellular, satellite, or Wi-Fi message), it can be turned on when the station
goes into alarms.
1.7.8.2.
Switched Power
Terminal #10 is the switched battery output. It is lSW POWER.
