User's Manual

905U-E Wireless Ethernet Bridge User Manual
Man_905U-E Rev 1.0 Page 6
2.3 Power Supply
The 905U-E module is powered by a 10 - 30VDC
supply. The power supply should be rated at 1 Amp and
be CSA Certified Class 2.
The negative side of the supply is connected to "COM"
and may be connected to “ground”. The supply negative
is connected to the “GND” terminal internally. The
positive side of the supply must not be connected to earth. The supply may be a floating supply
or negatively grounded.
The power requirements of the 905U-E units is 700mA at 12VDC or 450mA at 24VDC.
2.4 Ethernet Connections
HUB NIC
2.4 Serial Connections
2.4.1 RS232 Serial Port
The serial port is a 9 pin DB9 female and provides for connection to a host device. This
port is independent of the RS485 port. Communication is via standard RS232 signals.
The 905U-E is configured as DCE equipment with the pinout detailed below.
905U-E
10 – 30 +
VDC -
+
-