Black Box RS-232 manual Typical Application, Package Includes, Specifications

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Typical Application

 

Dedicated

Dedicated

 

Line

 

Modem (A)

 

 

RS-232

 

 

Fallback

 

 

Switch

Dialup

Server

Dialup

Circuit

 

Modem (B)

 

 

procedure includes:

Running cable from your primary modem (or other device) to the rear-panel PRIMARY connector.

Running cable from your alternate modem (or other device) to the rear-panel ALTERNATE connector.

Running cable from the master or common device (server, PC, host, printer, etc.) to the rear-panel MASTER connector.

Attaching the switch’s power cord.

The RS-232 Fallback Switch begins operating when it receives power. The type of switching, whether it’s automatic or manual, is determined by the position of the front-panel toggle switch. LEDs light up to show whether it’s switched (automatically or manually) to the primary device, or if it’s switched to the alternate device.

Specifications

Compliance: FCC Part 15, Class A; DOC Class/MDC classe A; CE

Compatibility: Compatible with dialup modems using ITU-TSS V.34, V.32 bis, V.32, and most other major modem standards

Data Format: Transparent to data format

Data Rate: Up to maximum rate supported by cabling

Distance (Maximum): 50 ft. (15.2 m) to any attached RS-232 device using standard cables

Interfaces: EIA RS-232C, modular telco

Connectors: (3) rear-mounted DB25 F: Common (master), primary, and alternate ports

Indicators: (2) front-mounted LEDs showing active channel (ALT/PRI)

Temperature Tolerance: Operating: 32 to 122˚F (0 to 50˚C);

Storage: -4 to +158˚F (-20 to +70˚C)

Humidity Tolerance: Up to 95% noncondensing

NOTE: For all DCE connections to the the PRIMARY and ALTERNATE connectors, use straight-through pinned RS-232 cable. For DTE connections to the same ports, you’ll need specially cross-pinned cable (for details, call Black Box Tech Support). For DTE connections to the MASTER connector, use straight-through-pinned RS-232 cable. To attach a DCE device to the MASTER port, use specially cross-pinned cable (for details, call Black Box Tech Support).

Package Includes

Flow Control: Transparent to flow control, but monitors/ switches on DSR, CTS, or RLSD (DCD); also passes or forces DTR

Leads/Signals Supported:

2 through 6, 8, 15, 17, 20 through 22, and 24 (TD, RD, RTS, CTS, DSR, RLSD [CD], TSETC [TC], RSETC [RC], DTR, RI, and TSETT [EXTC] respectively); 1 and 7 (PGND and SGND respectively) are tied common

User Controls: (1) front-mounted toggle switch for selecting automatic/ primary/alternate;

(4) internal configuration jumpers

MTBF: 180,000 hours

Enclosure: High-impact ABS plastic

Power: SW901A: 115 VAC, 60 Hz, through detachable power cord (included) and internal power supply;

SW901AE 230 VAC, 50 Hz, through detachable power cord (not included) and internal power supply;

Consumption (both models): 8 watts

Size: 2.5"H x 8"W X 12"D (6.4 x 20.3 x 30.5 cm)

Weight: 2.7 lb. (1.2 kg)

The RS-232 Fallback Switch

Detachable power cord

Users’ manual

Ordering Information

ITEM

CODE

RS-232 Fallback Switch

 

115-VAC

SW901A

230-VAC

SW901AE

You may also need…

RS-232 Cable, 25 Conductors (1212 Pairs)—Pins 1–25

(Specify gender and length)

................................ECM25C

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Contents Automatic or manual modes Key FeaturesSimple to set up and operate Package Includes SpecificationsTypical Application
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RS-232 specifications

Black Box RS-232 is a versatile device designed for serial communication using the well-established RS-232 standard. The RS-232 standard has been a cornerstone for serial communication since its introduction in the 1960s and is widely used in various applications today.

One of the main features of Black Box RS-232 devices is their ability to communicate over relatively long distances, up to 50 feet or more, while maintaining clear and reliable signal quality. This capability makes it ideal for connecting devices like computers, modems, and other serial peripherals in environments where distance could pose a problem.

Another key characteristic of Black Box RS-232 products is their support for both hardware and software flow control. This flexibility allows users to choose the best method for managing data transmission, preventing data loss and ensuring efficient communication. Additionally, many Black Box RS-232 devices are configured to support multiple baud rates, which allows them to communicate at varying speeds, accommodating different devices and requirements.

Black Box RS-232 devices often come equipped with multiple ports, which can support simultaneous connections to various devices. This multitasking ability is particularly beneficial in industrial and commercial settings where numerous devices need to communicate with a central control system.

The technology behind Black Box RS-232 incorporates robust signal processing capabilities to reduce noise and ensure data integrity. This is particularly important in settings where electromagnetic interference (EMI) could compromise communication reliability. Furthermore, some Black Box RS-232 products feature built-in diagnostics tools that help users troubleshoot potential issues quickly, enhancing overall productivity.

In terms of physical characteristics, Black Box RS-232 devices are typically compact and durable, making them suitable for both desktop and rack-mounted installations. Their design often includes user-friendly interfaces that simplify setup and configuration, making them accessible even to those with limited technical expertise.

In summary, Black Box RS-232 offers a reliable, flexible, and robust solution for serial communication needs. Its key features, including long-distance communication capabilities, support for diverse flow control methods, multiple port configurations, and noise-reduction technologies, make it an invaluable asset in a range of applications from industrial automation to data acquisition in scientific settings. This combination of reliability and versatility solidifies Black Box RS-232 as a preferred choice for businesses and industries relying on effective serial communication.