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Model 2025

Asynchronous Metallic Modem

S.I. Tech Model 2025 Asynchronous Metallic Modem

Model 2025 combines connector to connector compatibility with outstanding performance characteristics. It supports full duplex transmission between RS-232-C compatible EDP equipment at distances up to 20,000 feet. It operates at speeds from 110 bps to 56 Kbps.

An asynchronous, simplex or full duplex system for in house and other short-haul data transmission applications. A complete
standalone component with RS-232 interface, 120 volt power cord, plus input and output transmission connections.

LEDs are used to indicate the presence of carrier and data signaling over the data path. A diagnostic logic probe is included that can be used to verify "high" or "low" status of the following circuits: TD, RD, RTS, CTS, DSR, and DCD without a breakout unit.

S.I.Tech will provide the best possible system solution for the operating environment of your data network. The Bit Rate/Distance chart shows typical cables and performance characteristics with S.I.Tech Bit-Drivers®.

Bit Rate/Distance

S.I. Tech Model 2025 Diagram

LENGTH-THOUSAND FEET (1 Km = 3280 Feet)

Specifications

Operating Mode:	Asynchronous, simplex or full duplex
Input/Output Interface:	RS-232-C, Type D Asynchronous at 110 bps to 56 kbps
Transmission Line Interface:	Balanced two-pair metallic circuit D.C. continuity required
Transmission Distance:	20,000 ft. maximum (6100 m) See Bit Rate/Distance Chart
Transmission Line Protection:	Protected at 8 volts up to 50 Amp pulses
Operating Temperature:	0°C to 50°C
Input Power:	105 to 130 VAC, 50-500 Hz, 10 W power transformer secondary fused. Three wire standard cord for wall outlet.
230Volt Version:	Model 2025V
Metal Enclosure:	7.5” x 7” x 3” (19 x 17.8 x 7.6cm)
Weight:	3lb. (1.36kg)
Rack Mount Version:	Model 2325
Analog Multidrop:	Model 2025MD

RS-232 Connector Pins Utilized by Model 2025

S.I. Tech Model 2025 Diagram

Typical Application

S.I. Tech Model 2025 Diagram