Bb-electronics 485LPCOR - Datasheet User Manual download pdf

485LPCOR-0812 -1/2

www.bb-elec.com [email protected] [email protected]

International Office: 707 Dayton Road PO Box 1040 Ottawa, IL 61350 USA 815-433-5100 Fax 433-5104

European Office: Westlink Commercial Park Oranmore Co. Galway Ireland +353 91 792444 Fax +353 91 792445

PRODUCT INFORMATION B&B ELECTRONICS

Model 485LPCOR

Port-Powered RS-485 Converter

The 485LPCOR is a port-powered two-channel RS-232 to RS-485 converter. It converts the TD and RD RS-232 lines to

balanced half-duplex RS-485 signals. The unit is powered from the RS-232 data and handshake lines whether the lines

are high or low. An external power supply can be connected to two pins on the RS-485 connector if no handshake lines

are available. The 485LPCOR has a DB-25 female connector on the RS-232 side and a DB-25 male connector on the

RS-485 side.

Robert M. Paratore, Director of Engineering RS-232 Side:

Connector: DB-25 Female

Signals: Passes through pins 2 (TD) and 3 (RD).

Pins 4 (RTS) and 5 (CTS) are tied together.

Pins 20 (DTR), 6 (DSR), and 8 (CD)

are tied together.

RS-485 Side:

Connector: DB-25 Male

Signals: Half-duplex two-wire operation only.

Automatic control circuit enables driver only

when transmitting.

Receiver is disabled when transmitting to prevent echo back

to RS-232 device.

Can transmit up to 4000 feet at 115.2k baud.

Power Requirements

No external power required if two RS-232 output handshake lines are available.

External 12VDC can be applied to pins on the RS-485 side between pins 25 (+) and 12 (GND) if handshake lines are

not available.

35mA current draw maximum under normal operation when externally powered.

NOTE: When using an external supply, the supply should be connected only to specifically labeled power

inputs (power jack, terminal block, etc.). Connecting an external power supply to the handshake lines may

damage the unit. Contact technical support for more information on connecting an external power supply to

the handshake lines.

Dimensions: 2.20 x 2.16 x 0.64 in ( 5.59 x 5.49 x 1.63 cm)

Connections and Operation

To DB-25 RS-232 DTE device: To DB-25 RS-232 DCE device: To RS-485 device or network:

Can use 25-pin straight through cable. Can use 25-pin cable that crosses pins 2 & 3.

DECLARATION OF CONFORMITY

Manufacturer’s Name: B&B Electronics Manufacturing Company

Manufacturer’s Address: P.O. Box 1040

707 Dayton Road

Ottawa, IL 61350 USA

Model Number: 485LPCOR

Description: Port-Powered RS-485 Converter

Type: Light industrial ITE equipment

Application of Council Directive: 89/336/EEC

Standards: EN 55022

EN 61000-6-1

EN 61000 (-4-2, -4-3, -4-4, -4-5, -4-6, -4-8, -4-11)

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Model 485LPCOR 1
485LPCOR-0812 -2/2 2

Summary of Contents

Page 1 - Model 485LPCOR

Page 2 - 485LPCOR-0812 -2/2

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