• Fast auto TX-enable RS232 <=> RS485 interface converter for 2-wire, half-duplex communications, in point-to-point or multi-drop communications networks, at distances up to 4000 ft. and data rates up to 115.2Kbps. Also, the unit is designed for extended operation to distances up to 12,000 ft. and data rates up to 38.4Kbps (typical).
• Galvanic (Opto/Xformer) Isolation helps eliminate noise, and protects equipment from destructive transients found in industrial applications.
GENERAL DESCRIPTION and TYPICAL APPLICATIONS:
The IRSFC24H is a fast Async bi-directional RS232 <=> RS485 interface converter for 2-wire, half-duplex applications, with an automatic TX enable circuit, that will operate at data rates up to 115.2Kbps. The unit has no jumpers and has been "tweeked" for extended distance operation. The unit has three LED indicators, a power screw terminal strip, an RS232 screw terminal strip, an RS485 screw terminal strip, and uses a limited slew rate transceivers. Galvanic isolation between the RS232 and RS485 helps to eliminate a wide variety of problems encountered in industrial and/or real world applications.
The IRSFC24H is designed for office and/or industrial applications, and provides superior characteristics/features normally found only on more expensive units. The IRSFC24H can be used in outdoor applications; however, many factors can affect reliable operations. Please call for additional information and/or peruse our Fiber Optic product line (compatible with our "copper" converters).
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IRSFC24H.pdf | Converter schematic |
Click on an image for a larger view:
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PHYSICAL PROPERTIES and FEATURES:
| RS232: | 3-wire interface to screw terminal strip (TX, RX, Common). |
| RS485: | 3-wire screw terminal strip (Common, TX/RX-, TX/RX+). |
| Power: | 2-wire screw terminal strip (9-35VDC). |
| LEDs | TX-RS485(RED), RX-RS485(GRN), Power(GRN). |
| Bias: | Fixed 1.8K pull-up, 10K pull-down, and additional bias (see schematic) |
| Termination: | Effective termination of approximately 10K+ |
| Special: | Fully automatic mode of operation and extended distance. |
| Protection: | P6KE6.8A Transient Voltage Suppressors inside 1N4004 diode bridge circuit, auto-reset communications fuses on RS485 TX/RX data lines, 1500VDC, 1 sec. Galvanic isolation. |
| Distance: | RS485 up to 4000 ft. (1250 meters), (12,000 ft. @ 38,400+ typical). |
| Operation: | 2-wire, half-duplex RS485. |
| Format: | Asynchronous data with any combination of bits, parity, stop |
| Speed: | Up to 115.2Kbps (slew limited driver) |
| Temperarure: | 0-65C (32-150F) ambient. |
| Humidity: | 10-90% non-condensing. |
| Voltage: | 9-35VDC |
| Power: | Under 3/4 Watt (typical) + external load. |
| Size: | 3.50" X 3.00" X 0.9" (PC Board), with connectors: 3.50" X 3.25" |
| Mounting: | 4-Holes 3.00" X 2.25" (built-in standoffs for #6 hardware) |
| IRSFC24H: | $99.00 ea. (Circuit board only). |
| Enclosure: | $10.00 ea. (Medium) |
| Cable: | User supplied to screw terminals. |
| Supply: | $7.50 ea. (9VDC @ 200/300 mA wall power supply) |
| *IRSFC24H with all options: IRSFC24H-BPS @ $116.50 ea. (Qty. 1-9) |
Please call us at: 513-874-4796
| 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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