User Documentation
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6. Getting Started
6.1 Reset to factory default values by external Reset button
The reset button located on top side of the housing - is used to load factory defaults. Use a pointed
object such as a straightened paper clip to hold the reset button down for 5 seconds. Release the
reset button when the Ready LED stops blinking.
6.2 Connecting Power
Connect the unit to a power source of range 12 to 48 VDC. For pin assignments of power terminal
block please refer to chapter 4.6 (Pin Assignments).
Note: The unit does not have an on/off switch. It automatically turns on when it receives power. The
PWR LED on the top panel will glow to indicate that the unit is receiving power.
6.3 Connecting Serial Devices
serial devices, depending on the 2 different connector types:
For RS232 connections the DB9 male connector has to be used. You can either use a standard
DCE/DTE cable or you may make your own customized serial cable to connect a serial device to the
chapter 4.6 (Pin
Assignments).
For connecting multiple devices via a RS-485 multidrop network the 5-pin terminal block has to be
used. All devices that are connected to the serial port must use the same protocol (i.e., either Modbus
RTU or Modbus ASCII). For the pin assignments of the uterminal block connector please refer
chapter 4.6 (Pin Assignments).
RS-485 Termination and Pull High/Low Resistors
In some critical RS-485 environments, you may need to add termination resistors to prevent the
reflection of serial signals. When using termination resistors, it is important to set the pull high/low
resistors correctly so that the electrical signal is not corrupted. For serial port DIP switches are used to
set the pull high/low resistor values. A built- also be enabled.
To modify the termination and pull high/low resistor settings, please refer to chapter 4.4 (Jumpers).
6.4 Connecting to a Host or Network
ports
behave like an unmanaged 2-Port-Switch. For the connection to a host or an Ethernet Switch use a
standard straight-through or a crossover Ethernet cable.
live Ethernet connection.