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724-746-5500 | blackbox.com
Page 14
724-746-5500 | blackbox.com
Chapter 2: Overview
Table 2-2. LES421A components.
Number in Figure
2-1 or 2-2 Component Description
1 (1) RJ-45 connector
Connects a standard Ethernet network drop using a straight-through RJ-45 male Ethernet cable.
2 (1) 5-position terminal block connector
Connects to an RS-422 or RS-485 serial device when the DB9 M (RS-232) connector is disabled.
3 (1) DB9 male connector
Connects to an RS-232 serial device when the 5-position terminal block (RS-422/RS-485) is disabled.
4 (1) 2-wire terminal block connector
Removable 2-position terminal block with +, -, and chassis ground connections.
5 (1) Serial Port LED
Flashes green when data is being transmitted or received on the serial port.
Lights steady green when the serial port is open.
6 (1) Ethernet Link LED
Lights when a connection is made.
Flashes when there is data traffic on the Ethernet link.
7 (1) Ready LED
Lights green continuously when the unit is initializing.
Flashes once per second when the system is operating correctly.
Off when something is wrong, for example, another device uses the same IP address.
8 (1) Reset button
Used to initiate a hardware reset, enter console mode, or reload factory defaults.
2.4.2 2-Port Hardened Serial Server (LES422A)
Figures 2-3 and 2-4 show the front and top panels of the LES422A. Table 2-3 describes its components.
4
4
1
2
2
7
6
7
3
Figures 2-3 and 2-4. LES422A front and top panels.