CHAPTER 5: Configuration and Operation

5.6 LAN/Serial-Port Commands

You can use simple ASCII-character commands to control the SCSI Switch through either its LAN port (by opening a socket connection to port 3001) or one of its RS-232 serial ports. For serial control, set your computer’s serial port this way:

a. Baud rate: 9600 (the switch’s factory default) or 19,200 bps.

b. Data format: 8 data bits, 1 stop bit, no parity.

c. Transmission mode: Half-duplex.

So, for example, the DOS command to set a PC for serial communication with the switch would be MODE COMx 9600,N,8,1. Whether you’re using a LAN or serial connection, commands have the same syntax (format):

a. Start sequence: ASCII <cr> (carriage return) followed by two slashes (“//”)

b. Switch box number (you need this even if you have only one SCSI Switch):

Box 1

- 7C hex (ASCII “”)

Box 3

- 7E hex(ASCII “~”)

Box 2

- 7D hex (ASCII “}”)

Box 4

- 7F hex (ASCII <del>)

c. Port selection:

Port A to port 1: “A1”, port A to port 2: “A2”;

Port B to port 1: “B1”, port B to port 2: “B2”

NOTE

1.More than one port connection can be selected at the same time. For example, to select A1B2, transmit “A1B2.”

2.“0” clears (disconnects) all numbered ports. For example, “A0” clears any numbered port connected to port A.

d.Connection or disconnection type:

ASCII “K” connects the specified ports and strictly adheres to SCSI rules.

NOTE

With “K,” if port A or B is not specified, no action will be taken on that port. If a connection is selected (for example, “A1”), that connection will be made, and the other numbered port will be disconnected from that lettered port. For example, entering “A2K” when port A is connected to port 1 will disconnect port A from port 1 and connect it to port 2.

ASCII “N” connects the specified ports without breaking existing connections. ASCII “F” disconnects the specified ports.

e. End sequence: ASCII <cr>

So, for example, the complete command to connect the first SCSI Switch’s port A to port 2 and its port B to port 1 would look like this: <cr>//A2B1K<cr>

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Black Box SC121A, SC120A-R2 manual LAN/Serial-Port Commands
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SC121A, SC120A-R2 specifications

The Black Box SC120A-R2 and SC121A represent the cutting edge of industrial networking devices designed for robust performance and versatility in various environments. These devices are tailored for applications that require reliable data transmission, making them essential in modern automation and control systems.

One of the standout features of the Black Box SC120A-R2 and SC121A is their advanced serial-to-Ethernet conversion capability. This functionality allows users to connect legacy serial devices to Ethernet networks seamlessly. With support for multiple protocols, including TCP/IP and UDP, these converters ensure smooth communication between devices, regardless of their original architecture.

Both models are engineered to withstand harsh industrial conditions. They feature a rugged construction that includes high-quality enclosures designed for durability and protection against dust, moisture, and extreme temperatures. This resilience makes them ideal for use in factories, transportation, and other challenging environments.

In terms of connectivity, the SC120A-R2 and SC121A come equipped with multiple serial ports, enabling simultaneous connections to various devices. The auto-sensing capability of these ports simplifies installation and configuration, making them user-friendly for both technical and non-technical personnel. Users can easily manage and monitor connections through a straightforward web-based interface.

Additionally, these devices incorporate advanced security features, including encryption and authentication protocols, ensuring that data transmission remains secure from potential threats. This focus on security is crucial for industries where sensitive data is transmitted, enhancing overall system integrity.

The SC120A-R2 and SC121A also support a range of network configurations, allowing for flexibility in deployment. Their compatibility with various operating systems ensures that users can integrate them into existing systems without significant modifications.

Moreover, these models offer flexibility in power options, supporting both PoE (Power over Ethernet) and traditional power supply methods. This versatility enables easy installation without the need for additional power infrastructure.

Overall, the Black Box SC120A-R2 and SC121A are sophisticated networking devices that combine advanced technology with rugged design. Their ability to bridge the gap between legacy serial interfaces and modern Ethernet networks, coupled with robust features and security measures, makes them a valuable asset for numerous industrial applications. Whether in a manufacturing plant or a transportation hub, these devices provide reliable, efficient, and secure communication solutions that meet the demands of today's connected world.
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