Logo RS485 Authority
Questions? Custom builds? We build and support all of our boards.
If you have a special application, we may already have a solution for you.
Give Ron a Call at 513-874-4796 or 513-638-0228 for additional information.
IRSFC24T: Opto/Xformer Isolated Async RS232 to RS485 fast
automatic converter with switching regulator and transient protection

IRSFC24T with Box

IRSFC24T Label

"Let me spin a very large
RS485 network for you!"

spider
  • Note: This product has been replaced by the enhanced Model IHV24AT.

  • Fast auto TX-enable RS232 to 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:

The IRSFC24T is an isolated, automatic converter that enables an RS-232 port to send and receive RS485 data. Five LED indicators show the system status and quickly identify the source of problems without requiring additional diagnostic equipment. Two versions are available that are designed for either Master-Slave or Bi-directional communications. The Master-Slave version is designed to monitor communications that originate at the Master-RS232 side of the interface. A response is expected back from an RS485 Slave device within a "reasonable" period of time (approximately 50uSec. To 20Sec.). The Bi-directional version simply displays the TX and RX functions independently without timing out. The IRSFC24T has many features and abilities that will solve problems, save time and aggravation in designing, installing, and maintaining and RS485 link or network. The converter introduces no communications delays and does not depend on any communications protocol. Baud rates, parity, number of data bits, check sums, timing, handshaking, and control characters do not affect the converter's automatic operation. See manual for further information.

The IRSFC24T is a fast Async bi-directional RS232 to 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, and RS232 DTE/DCE selection. The unit has five LED indicators, an RS485 removable screw terminal strip, an 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 IRSFC24T 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).

Need something special? Please contact us. We have additional isolated and non-isolated converters, repeaters, and repeater hubs. Units are generally stock to 2-3 business days for shipment. We design and manufacturer our entire product line, and offer technical support for our units, and can offer system recommendations for your application. Please give us a call: 513-874-4796

Related Files:

pdf icon IRSFC24TrevB.pdf Converter schematic/physical Rev B
pdf icon IRSFC24T Manual.pdf Operating Manual

Physical Properties and Features:

RS232: 3-wire interface to RJ11/12 Connector (TX, RX, Common)
RS485: Removable 3-wire screw terminal strip (Common, TX/RX-, TX/RX+)
Power: 2.1mm center positive "Barrel" connector (9-35VDC) and Wago terminals
LEDs TX-RS232(RED), RX-RS232(GRN), TX-RS485(RED), POWER/OPERATING(YEL), and RX-RS485(GRN)
Bias: 620 Ohm pull-up and pull-down (jumper selectable)
Termination: 120 Ohms (jumper selectable)
Special: Fully automatic mode of operation and diagnostic features
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

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:

IRSFC24T: $199.00 ea. (Circuit board only).
Enclosure: $10.00 ea. (Medium)
Cable: $7.50 ea. (RS232, 7 ft., specify DB9F-7 or DB25F-7)
Supply: $8.50 ea. (12VDC @ 200/300 mA wall power supply)
*IRSFC24T with all options (DB9F cable): IRSFC24T-B9FPS @ $225.00 ea. (Qty. 1-9)

Need a different configuration or more information? Give Ron a Call at 513-874-4796 or 513-638-0228(Cell)

Webstore

Popular Products:

MHUBX8revE
IHV24AT
DIFAR44
ICSX7HV
ASC24TrevB1
IRS422HVrevB1
MHUBX8 IHV24AT DIFAR44 ICSX7HV ASC24T IRS422HV