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Professional Grade Opto-Isolated RS485 Converters

Integrity Instruments designs and manufactures the world’s most advanced RS485 converters available. All Integrity Instruments RS232 to RS485 protocol converters are microprocessor controlled to provide fully automatic half-duplex RS485 send data control. We have developed advanced algorithms that automatically adjusts to communications baud rates and provide automatic RS485 transmit enable control, while providing fully software configurable overrides for situations that demand precise timing control. All Integrity Instruments Professional / Industrial  grade optically isolated eXtra Performance (XP) RS485 converters are rated for industrial temperature range (-40C to +85C).

RS485 converter features:
• 3KV Optical Isolation
• Microprocessor controlled
• Fully automatic and auto speed sensing (no DIP switches)
• LED indicators for: power, TX data, and RX data
• DCE/DTE configurable on all models
• DB9, DB25 and DIN rail mounted options
• Jumper selectable RS485 termination
• Echo control (on/off)
• RoHS option
Model Interface Style Flow Control Temperature Documentation Price
XP485-9EI RS232 to RS485 DB-9 Auto-Enabled -40°C to +85°C $75.00
XP485-25EI RS232 to RS485 DB-25 Auto-Enabled -40°C to +85°C $75.00
RS232 to RS485 DB-9 Auto-Enabled -40°C to +85°C $80.00
XP485-DEI RS232 to RS485 DIN Auto-Enabled -40°C to +85°C $95.00
Model XP485-9E
XP485-9EI /

Model XP-485-25EI

Model XP485-DEI

Click images to enlarge
Specifications - Standard Grade RS485 Converters
Distance 1200 Meters
RS485 Connection 5 position screw clamp terminal block (+V, GND, Shield, A, B)
one twisted pair wiring A/B signals
Terminal Screw Clamp 3.5mm spacing for DB9 and DB25
Data Rates 600 bps to 115200 bps
Signal Settings Auto-Enabled No dip switches manual mode configurable
Isolation  3000 volt optical isolation 
Transmit Turnaround Bit time calculated
Transmit to receive turn-around is one bte time at current baud rate.
Fixed baud rate
Transmit to receive turn-around near zero for the selected baud rate.  See manual for more details.
Termination Jumper Selectable
EMI Low EMI RS485 driver
Protection Reverse polarity diode protection
Status LED's Yellow Power, Red Transmit, Green Receive
Power Requirements 7.5 VDC to 24 VDC 45 ma nominal (250 ma dead short) Our PS9J, PS9CST For Din