GENERAL DESCRIPTION and TYPICAL APPLICATIONS:
The RS422S is a fast Async bi-directional RS232 <=> RS422 interface converter that will operate at data rates up to 115.2Kbps. The unit has jumpers termination, RS232 DTE/DCE selection and, TTL/CMOS operation. The unit has two RJ11/12 connectors an a pin header for power, common TTL/CMOS TX data and RX data.
The RS422S is designed for office and/or indoor applications (non-isolated). A pair of units and a 6-conductor reversing "telephone style" cable can be used to form an RS232 "extension cord" for extended operation beyond the RS232 specification.
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RS422S.pdf | Converter schematic |
Click on this image of the RS422S for full-size (156k) photograph:
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PHYSICAL PROPERTIES and FEATURES:
| RS232: | 3-wire interface to RJ11/12 Connector (TX, RX, Common). |
| RS422: | RJ11/12 connector (TX pair, and RX pair). |
| Power: | 2.1mm center positive "Barrel" connector (9VDC)), linear regulator. |
| LEDs | None. |
| Bias: | Light bias network for Receiver. |
| Termination: | 120 Ohm (jumper selectable) |
| Special: | Pin header for TTL/CMOS operation |
| Protection: | None. |
SPECIFICATIONS:
| Distance: | RS422 up to 4000 ft. (1250 meters) |
| Operation: | Full-duplex. |
| Format: | Asynchronous with any combination of bits, parity and stop. |
| Speed: | Up to 115.2Kbps. |
| Temperarure: | 0-65C (32-150F) ambient. |
| Humidity: | 10-90% non-condensing. |
| Voltage: | 8-12VDC or 5VDC. |
| Power: | Under 1/2 Watt (typical) + external load |
| Size: | 2.50" X 2.00" X 0.9" (PC Board) |
| Mounting: | 4-Holes 2.00" X 1.50" (built-in standoffs for #6 hardware) |
OPTIONS AND ORDERING INFORMATION: (MODEL RS422S):
| RS422S: | $29.00 ea. (Circuit board only). |
| Enclosure: | $8.00 ea. (Small). |
| Cable: | $7.50 ea. (RS232, 7 ft., Specify DB9F-7 or DB25F-7). |
| Supply: | $7.50 ea. (9VDC @ 200/300 mA wall power supply). |
| *RS422S with all options (DB9F cable): RS422S-B9FPS @ $52.00 ea. (Qty. 1-9) |
CONTACT INFORMATION:
R. E. Smith, 4311 R. E. Smith Dr., West Chester, Ohio 45069, Ordering/Support: 513-874-4796, Fax: 513-874-1236, www.rs485.com
| Contact
Information: R.E. Smith, 4311 R. E. Smith Dr., West Chester, Ohio 45069 513-874-4796 Phone, 513-874-1236 Fax., rs485.com |
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