232/485COM: RS-232 to RS-485 Isolated Converter/Buffer specsheet

Features:

Small Sized Desktop Package
Optically Isolates RS-485 bus from RS-232 bus
No Additional Power Supply Required
Transmission Speeds up to 9600 BAUD
No Calibration or Setup Required
Microprocessor Controlled for High Accuracy
Adjustable Echo Filtering for Long RS-485 busses
High Noise Rejection
CSA and NRTL Approved (LR51078)

Function:
The 232/485COM Isolated Converter/Buffer converts RS-485 multi-drop signals to PC standard RS-232 signals. These can then be fed into a PC’s existing COM ports.

The 232/485COM provides electrical isolation between an incoming RS-485 bus from the field and the host PC’s RS-232 port. This helps to prevent power spikes or surges from entering the PC’s delicate internal bus structures. Such power surges or spikes could lock-up the PC or may even cause internal damage.

In addition, the 232/485COM can provide echo filtering in the case of a long RS-485 bus in the field. In some cases a long RS-485 bus that has several impedance mismatches can create echos that could scramble the messages sent to and from the host PC. By buffering data and delaying it slightly before sending it on the 232/485COM can help reduce problems associated with echos.

Specifications:

Conversion: RS-232 / RS-485 (bi-directional)
Transmission Speed: UP to 9600 BAUD
Isolation: Optical, 1500VAC test
Operating Temperature: -40 Deg.C. to +50 Deg.C.
Power: 24VDC, 100mA (RS-485 side) / 10VDC, 20mA (RS-232 side)
Enclosure: Metal Desktop Enclosure w/ Rubber Feet

Manuals:

232485COM