Black Box 1- User Manual

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Page 17

Chapter 3: Installation and Setup

3. Installation and Initial Setup

This section describes how to install the Hardened Serial Server and configure the device.

NOTE: In this section, devices to be connected to the Hardened Serial Server’s serial connections are simply referred to as the
“serial device.”

3.1 Connecting the Power Supply

Connect a DC power supply to the power terminals on the side of the Hardened Serial Server. Polarity of the wires is indicated
underneath each connector. Acceptable voltages are between 10 VDC and 58 VDC. The power supply must be capable of
supplying 4 watts for the LES421A or LES422A or 6 watts for the LES424A.

Figure 3-1. LES421A, LES422A, and LES424A power supply connections.

3.2 Connecting Hardened Serial Servers to Serial Devices

The Hardened Serial Servers can be connected to serial devices using RS-232, RS-422, RS-485 2-wire, or RS-485 4-wire
communication. LES422A and LES424A models use (2) or (4) DB9 M connectors. LES421A models use either (1) DB9 M connector
or (1) 5-position terminal strip.

3.2.1 RS-232

The 2- and 4-port models, along with the 1-port model when using its DB9M connector, support seven RS-232 signal lines (TD,
RD, DTR, DSR, RTS, CTS, DCD) plus Signal Ground.

The 1-port model, when using its 5-position pluggable terminal block, supports four signal lines (TD, RD, RTS, CTS) plus Signal
Ground.

NOTE: Only one connector (DB9M or 5-position terminal block) can be used on the LES421A.

Signals are single-ended and referenced to Signal Ground. Default communications parameters are 9600, 8, N, 1 (9600 baud,
8 data bits, no parity, 1 stop bit), and no flow control.

NOTE: The LES421A, LES422A, and LES424A are configured as DTEs. If they are connected to a computer or other DTE device,

use a null-modem (crossover) cable. If the serial device is configured as a DCE, use a straight-through cable.