The 5256 is recommended for multidrop networks if the RTS signal is not controllable. The transmitter is only active while data is being transmitted.  Recommended if Windows based software is used.

Use the 5256 for full duplex communication over RS-485 or RS-422 with remote devices up to 1.2km away.

The 5256 is flexible and easy to use. It provides a clean, reliable transmission medium, which is noise resistant.

It protects the PC or PLC from damage due to High voltage, using optical isolation.

It doesn't require specific software support to run.

It can run at any baudrate between 300 - 115200 Baud, and the baudrate is set automatically when data is received. It has automatic flow control. The 5251 allows a computer to communicate with remote devices up to 1.2km away.

Key Benefits
Time Saving:

Requires no technical setup procedures

Standard RS232 software needs no modification to run a RS485 link

No jumper settings necessary

High Performance:

Guaranteed to work over a data range of 300 to 115200 bps

Very fast data turnaround. For 8 bit no parity: 0.2ms at 9600bps

Communication distance of up to 1.2km (4000 feet)

Versatile:

Small size, lightweight unit

9 - 24 volt power supply

Works with any terminal software

Easy to Install:

DIN rail mounting with universal foot for symmetrical and asymmetrical rails

RS232 side takes standard DB9 connectorr

Screw terminal connector with strain relief for RS485

Separate transmit and receive lights show data flow

Ready To Send (RTS) indicator shows data flow (5255 only)

Safe:

Full optical isolation protects your computer from power spikes

Robust, sealed plastic unit

Microprocessor has watchdog protection, preventing the possibility of the module holding the line on failure

Warranty:
Three years

Used In:

Check production status

Control machinery

Gather statistics

Modify programs remotely

Control industrial networks

Control relays and read inputs Integrate with the 5000 Series Remote I/O Modules Communicate with remote devices

Many other applications

Specification

Dimensions (mm)	25(w) x 80(h) x83 (d) (1"x 3.15" x 3.26")
Enclosure	Robust ABS
Transmission Distance	1.2km (4000 feet)
Weight	90g
Operating temperature	32° to 140° F ( 0° to 50°C)
Storage temperature	-4° to 158° F (-20° to 70° C)
Humidity	15 to 90% relative non condensing
Isolation Voltage	1500V max transient (to EN 60950 : 1992)
Power	9-24Vdc unregulated
Power RS485	35mA at 12Vdc
DIN rail adapter	Add 32mm to depth (d)
Connectors	RS232: DB9 female RS485: Plugable 7 way screw terminal connector with strain relief 0.2-2.5mm2 (AWG 24-12)
Operating mode	4 wire full duplex point to point or Multidropp
Data rates	300 to 115200 bps
Indicator lights	TXD, RXD and STATUS