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RS232 to RS485 auto enabled converter with DB9 connector.
The 485-9E 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 485-9E data converter.
These interface drivers conveniently plug into the DB9 connector commonly found on the standard IBM-PC.
The 485-9E can operate for both DTE and DCE configurations with the possible addition of a NULL modem converter for certain DCE applications.
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| Specifications - 485-9E |
| Temperature Range |
0 to +70° C |
| RS-232 connection |
DB9 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 PS9J
or PS9CST power supply may be used.
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| Electronic Documentation |
Users Manual
Schematic
Dimensions
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