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RS-232 Over LAN Port
If you want the VN-Matrix units to pass serial data or control signals, such as for serial
control of a projector, connect RS-232 devices to RS-232 Over LAN port on all codecs that
are hosting controlled or controlling devices. Figure 11 shows how to connect a host device
to the pass-through device to the RS-232 Over LAN port (
b
on figure 2).
NOTE: The RS-232 Over LAN port also connects relay contacts that turn on when a
critical alarm occurs. See “Filter settings panel“ to define a critical alarm.
RS-232 FunctionPin
1
2
3
4
5
6
7
8
9
DCD
RX
TX
—
Gnd
DSR
RTS
—
—
Data carrier detect
Receive data
Transmit data
Common
Signal ground
Data set ready
Request to send
Normally closed
Normally open
51
96
RS-232
Alarm
Relay
—
—
—
COM
Gnd
—
—
NC
NO
OVER LAN
Figure 11. Pin Assignment for the RS-232 Over LAN Port
NOTES: • The VNC 325 uses 9-pin D male connectors. You may need an adapter.
• The default RS-232 protocol for the RS-232 Over LAN ports are as follows:
Baud rate: 115200 Data bits: 8 Parity: None
Stop bits: 1 Flow control: None
These parameters are configurable to agree with device to be controller (see
“Configuring a Serial Pass-through Group“ in the “Operation” section).
LAN Ports
NOTES: • The number of units that can be connected to the network, while still
providing optimal performance, varies depending on the data transport
method used. See “Data Transport Methods” on page 7 for details.
• Do NOT connect VN-Matrix units to an existing network until each is correctly
configured. Incorrect configuration may cause disruption to other network
users. See “Configuring Network Settings” to configure the units.
• Items
d
and
e
, below, are identified in figure 2 on page 6.
d LAN 1 port — If desired, connect a CAT 6 cable between this port and the
1
network.
NOTE: The factory default IP address for this port is 192.168.0.1.
Link (left) LED indicator — Indicates that the codec is properly connected
to an Ethernet LAN. This LED should light steadily.
Act (right) LED indicator — Indicates transmission of data packets on the RJ-45
connector. This LED should flicker as the codec communicates.
VN-Matrix 325 Serial Digital Over IP CODEC • Installation and Setup 21