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0.25 LBS
Calculated at checkout

Product Description

Model: 485-25EL

RS232 to RS485 auto enabled converter with DB25 connector, extended temperature range.

The 485-25E auto enabled converter provides error free half-duplex data communication utilizing the standard RS485 protocol. The RS485 driver is automatically enabled using an algorithm in the on board microprocessor providing fast multi-drop capability for a variety of applications using the single pair RS485 differential signals.

No dip switches to set!


We created the industry's first fully automatic self-adjusting microprocessor based Auto Enabled RS232 to RS485 converter. For the next generation of auto enabled converters see our XP485-25E converter.

Distances in excess of 4000 feet are easily attained with the 485-25E data converter.

These interface drivers conveniently plug into the DB25 connector commonly found on the standard IBM-PC.

The 485-25E can operate for both DTE and DCE configurations with the possible addition of a NULL modem converter for certain DCE applications.


Specifications - 485-25EL

Temperature Range -40 to +70° C
RS-232 Connection DB25 female
RS-485 Connection 5 position 3.5mm spaced terminal block
one twisted pair wiring A/B signals
Distance 4000 feet
Speed 600 BPS to 115200 BPS
PC Comport Flow Control Settings None required Auto Enabled
Signal Settings Auto Enabled
Transmit Turn Around Transmit to receive turnaround
One byte time at choosen baud rate (see manual)
Protection Reverse polarity diode protection
Nodes 255 nodes on a single twisted pair
Linear Technologies LTC1487
EMI Low EMI RS-485 driver
Linear Technologies LTC1487
Termination On board jumper pin control provided
Status LEDs Yellow power indicator
Red transmit 232 to 485
Green receive from 485 to 232
Power Requirements 7.5VDC to 24VDC
45 ma nominal (250 ma dead short)
Power Supply External power supply required.
Power can be connected to terminal block, or convenient power jack.
Our PS9JS or PS9J power supply may be used.
Electronic Documentation

Users Manual

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