User`s manual

Table Of Contents
OnCell G3111/G3151/G3211/G3251 Series User’s Manual Getting Started
2-6
Connecting to the Network
Connect one end of the Ethernet cable to the OnCell G3111/G3151/G3211/G3251s 10/100M
Ethernet port and the other end of the cable to the Ethernet network.
If the cable is properly connected, the OnCell G3111/G3151/G3211/G3251 will indicate a valid
connection to the Ethernet as follows:
The Ethernet LED glows a solid green when connected to a 100 Mbps Ethernet network.
The Ethernet LED glows a solid orange when connected to a 10 Mbps Ethernet network.
The Ethernet LED flashes when Ethernet packets are being transmitted or received.
Connecting to a Serial Device
The OnCell G3111 and G3211 support one or two RS-232 port that connects through a DB9 male
connector on the bottom panel.
The OnCell G3151 and G3251 support one or two RS-232/RS-422/RS-485-4w/RS-485-2w port
that connects through a DB9 male connector on the bottom panel.
Adjustable Pull High/Low Resistors for the RS-485 Port (G3151/G3251)
In some critical 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. Since a particular pull high/low resistor value
cannot fit all environments, the OnCell G3151/G3251 uses DIP switches to set the pull high/low
resistor values for the serial port.
To set the termination resistor to 150 , make sure both of the assigned DIP switches are in the
OFF position. This is the default setting.
To set the termination resistor to 1 , make sure both of the assigned DIP switches are in the
ON position.
ATTENTION
Do not use the 1 K setting on the OnCell G3151/G3251 when using the RS-232 interface.
Doing so will degrade the RS-232 signals and shorten the maximum allowed communication
distance.
DIP switches on the bottom of the OnCell G3111/G3151/G3211/G3251 are used to set the pull
high/low resistor value for each serial port.
SW
2
3
4
Pull Low
Terminator
---
ON
1 K
120 K
---
OFF
150 K
---
---
Note: If the pull high/low resistor on your device is already set for RS-485, make sure the
default SW for RS-232 is “OFF” when you switch back to RS-232 interface.