Omega Products LDM80-S-025 User Manual

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⻬ Data Rates to 19.2K

Baud at 2.2 Miles (3.5KM)

⻬ 17dB Optical Link

Power Budget

⻬ Powered by RS-232

Host Port Signals

⻬ Full Duplex

Asynchronous Operation

⻬ Indicating LEDs ⻬ DCE/DTE Switch ⻬ Designed for FCC

Class A Requirements

⻬ Complies with FCC

Class A Requirements

⻬ Pinned or Socketed

RS-232 Connectors

LDM80 Signal Powered Fiber Optic Modem

The LDM80 is a small, inexpensive fiber optic transmitter/receiver completely powered by the host RS-232 port. The enclosure for the LDM80 is a conductive shell which greatly reduces RF radiation and susceptibility. The rugged metal enclosure is small enough to mount on the back panel of typical computer equipment saving valuable desk and floor space. A pair of these units allows most RS-232C cable links to be replaced and extended with a duplex fiber optic cable. The normal 50-foot RS-232 limit may be extended to

2.2 miles (3.5 km). Fiber optic data communications provide complete EMI/RFI rejection, isolation, elimination of ground loops, and reduced error rates. Data security is enhanced by almost nonexistent electromagnetic emissions.

Specifications

Model LDM80

Baud Rate Range 0 – 19.2K

Distance: Over Baud Rate Range

Fiber Core Diameter (µm) Max. Cable Length (km) Loss Budget (dB)

100 (glass) 3.5 17

50 (glass) 2.5 9

62.5 (glass) 2.0 11 85 (glass) 3.5 16

200 (glass) 3.5 23

1000 (plastic) 30 meters 32

Channel Lines

(1)

TD, RD

Control Lines

(1)

RTS, CTS, DSR, DTR, RLSD

Modes Asynchronous 2-fiber full duplex, 1-fiber

simplex

Optical Transmitter 850 nm wavelength Output from 1 m cable -26dB typ, -27dB min, -18dB max Optical Receiver Power

Input for 4 µs Pulse -44dB min Distortion

Optical Connectors ST

The RS-232 connection is through male or female EIA 25-pin connectors. The fiber optic connection is through ST connectors. The LDM80 is equivalent to a 3-wire, full duplex, RS-232 circuit. Handshake signals are locally connected as in Figure 1.

Notes: (1) TD = Transmit Data, RD = Receive Data, RTS = Request To Send, CTS = Clear To Send. DTR = Data Terminal Ready, DSR = Data Set Ready, RLSD = Received Line Signal Detect.

195

Basic Unit

Extended Warranty

Program

Indicating LEDs come on during a "SPACE" on transmit or receive data. A TD/RD reversing DIP switch is provided for connection to DTE (Data Terminal Equipment) or DCE (Data Communication Equipment) ports.

Recommended Cables

The LDM80 optical transmitter may be used with a wide range of fiber sizes. Specifications are for 100/140µm. Other fiber sizes may be used with a resulting different cable loss budget.

LDM80-P-025, $195, Shown smaller than actual size

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Sockets

Pins

1.88 (47.8)

1.75 (44.5)

-0.1 (-2.54)

-0.219 (-5.56)

LEDs

1.42 (36)

2.17

(55.1)

3.51

(89.2)

1.65 (42)

0.382 (9.7)

0.729

(18.5)

Dimensions: Inches (mm)

0.26

(6.6)

To Order

(Specify Model Number)

Model No. Price RS232 Connector Field Connector

LDM80-P-025 195 25 Pin male ST fiber optic connector LDM80-S-025 195 25 Pin female ST fiber optic connector

Includes operator’s manual. OMEGACARESMextended warranty is available for models shown on this page.

Ask your sales representative for full details when placing order. Ordering Example: LDM80-P-025 converter, OMEGACARESM1year warranty for LDM80-P-025 (adds 1 year to standard 1 year warranty), $195 + 28 = $223.

Notes: (1) Ground-benign environmental conditions (no salt atmosphere, <50°C ambient temperature).

Model LDM80

RS-232 Output Voltage +5V logic 0, -5V logic 1 with 3kW Load DCE/DTE Switch One Diagnostic LEDs Two Power:

Port Power +5.0 to +8.5VDC, no current limit, 5mA

and/or DC operation >+8.5 VDC, 10mA current limit Operating Environment -20 to +70°C, 0 to 95% relative humidity, non-condensing Dimensions 3.51" x 1.88" x 0.729" (89.2 x 47.8 x 18.5 mm) Weight 8.1 oz (230 g) max MTBF

(1)

>100,000 hrs

AVAILABLE FOR FAST DELIVERY!

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