• 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.
• Galvanic (Opto/Xformer) Isolation helps eliminate noise, and protects equipment from destructive transients found in industrial applications.
GENERAL DESCRIPTION and TYPICAL APPLICATIONS:
The IRSFC24 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 jumpers for bias, termination, RS232 DTE/DCE selection, and operating mode settings. The unit has two LED indicators, an RS485 Wago terminal strip, two RJ11/12 RS485 connectors, 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 IRSFC24 is designed for office and/or industrial applications, and provides superior characteristics/features normally found only on more expensive units. The IRSFC24 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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IRSFC24RevB.pdf | Converter schematic/Physical Rev. B |
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IRSFC24RevA.pdf | Converter schematic/Rev. A |
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IRSFC24S.pdf | Physical description/Rev. A |
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PHYSICAL PROPERTIES and FEATURES:
| RS232: | 3-wire interface to RJ11/12 Connector (TX, RX, Common). |
| RS485: | Wago screw terminal (Common, TX/RX-, TX/RX+). |
| Power: | 2.1mm center positive "Barrel" connector (9-35VDC) and Wago terminals. |
| LEDs | TX-RS485(RED), RX-RS485(GRN). |
| Bias: | 910/2.2K Ohm pull-up and pull-down (jumper selectable). |
| Termination: | 120 Ohms or 120 Ohms in series with 0.1uF (jumper selectable). |
| Special: | Limited fixed data rates or fully automatic mode of operation. |
| 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. Rev. B boards 3.0KVDC, 1 sec. |
SPECIFICATIONS:
| Distance: | RS485 up to 4000 ft. (1250 meters). |
| 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) |
OPTIONS AND ORDERING INFORMATION: (MODEL IRSFC24)
| IRSFC24: | $99.00 ea. (Circuit board only). |
| Enclosure: | $10.00 ea. (Medium) |
| Cable: | $7.50 ea. (RS232, 7 ft., specify DB9F-7 or DB25F-7) |
| Supply: | $7.50 ea. (9VDC @ 200/300 mA wall power supply) |
| *IRSFC24 with all options (DB9F cable): IRSFC24-B9FPS @ $124.00 ea. (Qty. 1-9) |
Please call us at: 513-874-4796
| Contact
Information: R.E. Smith, 10330 Chester Road, Cincinnati, Ohio 45215 513-874-4796 Phone, 513-874-1236 Fax., rs485.com |
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