LWS40xA Hardware
Documentation Number: LWS40xA-906m
Chapter 2
11
Black Box Corporation - 1001 Park Drive - Lawrence, PA 15055-1018
www.blackbox.com
-- Tech Support and Ordering: 724-746-5500 - Fax: 724-746-0746
Connectors
Configuration Port Connector
One standard RJ-45 receptacle that allows the serial server to be connected to
personal computer for programming, troubleshooting and device
configuration. A standard straight-through RJ-45 (male) Ethernet cable can
be used for this purpose. (This port is not intended to connect directly to an
Ethernet network.)
Antenna Connector
The antenna connector is a reverse SMA connector.
(An omni-directional antenna is supplied with LWS40xA wireless serial
servers. All LWS40xA serial servers are FCC-certified when the supplied
antenna is used.)
Serial Port Connector(s)
•
LWS401A:
One DB-9M connector
•
LWS406A:
One five-terminal removable terminal block
•
LWS402A:
Two DB-9M connectors
o
Port 1:
RS-232
o
Port 2:
software selectable for RS-232, RS-422 or RS-485
•
LWS404A:
Four DB-9M connectors
o
Ports 1 & 3:
RS-232
o
Ports 2 & 4:
software selectable for RS-232, RS-422 or RS-
485
Power Connector
The power connector is a removable terminal block with four terminals.
From top to bottom the terminals are:
Terminal
Number
Terminal
Name
Connect to
Description
1
AC In
One side of AC power supply (if AC
power used)
2
AC In
Other side of AC power supply (if
AC power used)
24 VAC
1
DC GND
Negative side of DC power supply
(if DC power used)
Internally, the chassis ground of the
Server is connected to this terminal.
2 DC
power
supply
Positive side of DC power supply (if
DC power used)
+12VDC to 30 VDC
LWS40xA Hardware
12
Chapter 2
Documentation Number: LWS40xA-906m
Black Box Corporation - 1001 Park Drive - Lawrence, PA 15055-1018
www.blackbox.com
-- Tech Support and Ordering: 724-746-5500 - Fax: 724-746-0746
RS-485 Receiver Biasing
LWS40xA wireless serial servers provide built-in receiver biasing on RS-
485 ports (includes the LWS40
6
A
485
port, LWS402A Port 2 and
LWS404A Ports 2 and 4). The Data(+) line is pulled up to 3.3V supply using
a 4.7 k
Ω
resistor and the Data(-) line is pulled down to ground, also using a
4.7 k
Ω
resistor.
RS-422/485 Terminating
If a terminating resistor is deemed necessary, for RS-422 operation typically
a 120
Ω
resistor would be connected across the Receive Data(+) and Receive
Data(-) lines. For RS-485 operation the resistor would be connected across
the Data(+) and Data(-) lines.
For more information on Receiver Biasing and RS-422/485 Terminating access the
Black Box RS-422/485 Application Note available at
www.blackbox.com
)
Connections for Server Configuration
LWS40xA Wireless Serial Servers
can be configured via:
•
A wired connection to a RJ-45 Ethernet connector on the LWS40xA
front panel.
•
The wireless network
The wired connection is recommended for configuration, especially when
configuring wireless settings, to ensure communication is not lost while
changing settings.
Figure 6.
Wired Connection for Configuration