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Comnet RLFDX232M2/24DC RS-232 TTL Logic Data Link/Repeater/MM 2 Fiber/24VDC

The ComNet™ RLFDX series of serial data link/repeaters.
In stock (50 items available)
  • Brand
  • SKU
  • Weight
    2.00 lbs
  • Warranty
  • Condition
  • Status
Product availability status

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  • $472.50
Market price: $630.00, you save $157.50
  • 25% less
  • Shipping info
    We offer free ground shipping on every purchase of $300 and more for US.
  • Payment Methods

  • Return Policy
    We Offer a 30-Day Money Back Guarantee
  • Weight
    2 lbs
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This listing is for RLFDX232M2/24DC (Multimode) Repeater only. Use description below as a general reference.

The ComNet™ RLFDX series of serial data link/repeaters are substation-rated and industrially hardened form, fit, function and completely backwards-compatible replacements for the popular Garrettcom/Dymec 5843, 5844, 5845, and 5846-series of serial data link/repeaters. They are designed for deployment in environments where high levels of electromagnetic noise and interference (EMI) and severe voltage transients and surges are routinely encountered, such as electrical utility substations and switchyards, heavy manufacturing facilities, trackside and roadside electronic equipment, and other difficult out-of-plant applications. Optical connectivity provides significantly extended transmission distances compared to copper media; high levels of electrical isolation; enhanced reliability and protection for peripheral IEDs, RTUs, and other equipment; and operational safety.

The RLFDX series of serial data link/repeaters are easily field-configurable for point-topoint, point-to-multipoint/master-slave, loop, or bus topologies. They may be also used for electrical data protocol conversion: an RLFDX232 RS-232 modem and IED/RTU can communicate directly with an RLFDX485 RS-422/RS-485 modem and IED/RTU. The extremely versatile and simple-to-install RLFDX series is ideal for any mission-critical application where very high levels of reliability and network availability are of the utmost importance.


  • Fully electrically, mechanically, and optically identical to and backward-compatible with the Garrettcom/Dymec 5843, 5844, 5845, and 5846 Series. A ComNet RLFDX may directly replace a Dymec unit anywhere within the network.
  • Full-duplex, half-duplex, or simplex transmission of RS-232, RS-422, RS-485 2/4-wire data, or TTL logic
  • Certified to meet or exceed the requirements of IEEE 1613 Class 2 for electrical utility substations, EN60950 and Class 1, Division 2 (Groups A, B, C, & D) for use in hazardous locations.
  • RS-232 Version: DTE/DCE switching
  • Diagnostic test mode feature tests the copper and optical connections before the connected IED or RTU is active within the network.
  • Extended ambient operating temperature range of -40º to +85º C, with no fan/forced air cooling, for use in virtually any environment
  • Optical transmission distances of up to 5 km over multimode fiber; 30 km over single-mode fiber
  • +9 to 36 VDC, +/-36 to 59 VDC, or HV AC/DC (+/-88 to 300 VDC/85-264 VAC) operating power options. HV DC input permits operation directly from station battery bus power. 48 VDC and HV models’ DC inputs are isolated from ground, allowing operation from positive or negative DC sources.
  • Internal/self-contained high-reliability power supply – a screw terminal block connects directly to the power source for permanent, reliable, and maintenance-free operation
  • Status Indicating LEDs confirm operating status of the link for ease in troubleshooting
  • Rugged galvannealed and powder-coated panel-mount enclosure
  • IP-30 rated for ingress protection (2.5 mm objects)
  • Conformal coating of the circuit boards is optionally available, for use in humidity with condensation conditions (extra charge, see ordering information).
  • Made in the USA
  • Lifetime Warranty


  • Electrical substation automation & SCADA networks, protective relaying systems
  • Power transmission & distribution systems, remote wind farm, hydroelectric, and solar/photovoltaic power generation facilities, and other electrical utility-specific applications
  • Controlled access to electrical substations and power generating facilities, and other high-value, mission-critical sites
  • Industrial/Factory Automation & Process Control SCADA Networks
  • Chemical and petrochemical refining and processing facilities, oil and gas pipelines/transmission systems, and mining installations
  • Food processing operations
  • Wastewater treatment plants
  • Railway/trackside control and monitoring systems
  • ITS/Transportation traffic signalization networks
  • Integrated data transmission networks



  • Data Rate DC to 250 kbps
  • Data Transmission Asynchronous, simplex OR Full Duplex
  • Bit Error Rate 10-E9 Max.
  • Point to Point Latency 4 μS
  • Repeat Latency 400 nsec Max.

Fiber Optical Parameters (At Maximum Operating Temperature)

  • Optical Budget Typical Multimode: 19.5dB / Single Mode: 19dB
  • Output Power Typical Multimode: -10.5 dBm peak / Singlemode: -14.5 dBm peak
  • Receiver Sensitivity Typical Multimode: -30 dBm peak (62.5 μ/125) / Single Mode: -33.5 dBm peak (9 μ/125)
  • Wavelength Multimode: 850 nm / Single Mode: 1310 nm
  • Transmission Distance Multimode: Up to 5 km (62.5 μ/125 Cable @ 3 dB/km) / Single Mode: Up to 30 km (9 μ/125 Cable @ 0.5 dB/km)
  • Compatible Fiber Type Multimode: 50-200 μm / Single Mode: 9 to 13 μm

Configuration Switches

  • AC/DC Coupled
  • Link/Repeat
  • Pin 8 Drive Current
  • Pin 6 +5 VDC (DSR or CTS pull up)
  • Diagnostic Mode


  • Optical ST
  • Data DB-9 (9 Pin D-Type Female)
  • Power Removable, 3-pin Screw Terminal Block

Electrical Parameters Inputs

  • I/O Data Format EIA RS232; CCITT v.24
  • Input Impedance >3000 Ω
  • Input Voltage +/-30 Volts Max.


  • Output Impedance >300 Ω
  • Driver Output +/- Volts into 3000 Ω
  • Pin 8 Output 0 to 5 V / 67 or 207 Ω Source Impedance

Indicating LEDs

  • Power Transmit Fiber
  • Transmit Electrical Receive Fiber
  • Receive Electrical

Power Required

  • 24 VDC Multimode: +9 to 36 VDC @ 250 mA (3W) / Single Mode +9 to 36 VDC @ 340 mA (4.1 W)
  • 48 VDC Multimode: +/-36 to 59 VDC @ 250 mA (4W) / Single Mode: +/-36 to 59 VDC @ 340 mA (5.5 W)
  • HV Multimode: +/-88 to 300 VDC @ 35 mA (4 W) or 85 to 264 VAC @ 35 mA (4 W) / Single Mode: +/-88 to 300 VDC @ 50 mA (5.5 W) or 85 to 264 VAC @ 50mA (5.5 W)

Power Dissipation BTU/H

  • 24 VDC Multimode: 8.2 BTU/hr / Single Mode: 10.2 BTU/hr
  • HV & 48 VDC Multimode: 10.9 BTU/hr / Single Mode: 12.3 BTU/hr


  • Circuit Board Meets IPC Standard
  • Actual Weight HV & 48 VDC: 1.06 lb / 0.48 kg / 24 VDC: 0.56 lb / 0.26 kg
  • Dimensions (W × L × H)
  • HV & 48 VDC: 4.1 × 5.1 × 1.3 in (10.41 × 12.95 × 3.3 cm)
  • 24 VDC: 2.0 × 5.1 × 1.3 in (5.08 × 12.95 × 3.3 cm)


  • MTBF >250,000 hours
  • Operating Temperature Multimode: -40˚C to +85˚C / Single Mode: -40˚C to +70˚C
  • Storage Temperature -40˚C to 85˚C
Free Ground Shipping
We offer free ground shipping on every purchase of $300 and more for US and US territory. Please choose "Free Ground Shipping (UPS/USPS)" option at checkout.

UPS Ground
UPS provides up-to-date tracking information. Ground service takes anywhere from 2-7 working days for delivery depending on destinations.UPS Ground does not deliver on Saturdays, Sundays or Holidays.

USPS Priority Mail/USPS Express Mail For all shipments shipped via USPS, we offer 'DELIVERY CONFIRMATION' number with each package. Difference between tracking number provided by UPS vs USPS Delivery Confirmation number is: Delivery Confirmation status is updated when the delivery has been made or when the package has made it through major USPS stations.

Air Shipment
Air shipments, Overnight, 2nd day and 3 day select methods offer guaranteed delivery time for your shipment. If you are in hurry or in need for the items on schedule, select one of these methods. Up-to-date tracking information is provided with each Air Shipment. BZB Express has the right to choose between Air shipments to meet or reduce delivery time. For guaranteed delivery of multiple items with expedited shipping, please contact our customer service representative for personalized assistance to get your items delivered to you when you need them.

International Customers
We offer shipping via USPS/UPS for our international customers. You can find different shipping options during checkout.

Most items ordered from BZB Express will be shipped out from our California Warehouse. Will-Calls are only allowed with Appointment Only - Please call Customer Service to set one up between the hours of 9am to 6pm PST.


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Paypal: You can select an option of Paying with Paypal in our shopping cart.
Money orders: and personal checks or company checks (may take up to 10 days to clear).
Wire Transfer: ( Bank Transfer ) only for the amount over $500. Contact us for the bank details.
Phone Orders: To place a phone order please call 1.888.660.2962 or 1.916.246.6263 and one of our Customer Service Representatives will take your order (8:00am - 6.00pm PST).

Purchase order: Fax purchase orders to 1.916.246.6258

We Offer A 30-Day Money Back Guarantee: 
Our main goal is to ensure your complete satisfaction with our service and products. If, for any reason, you are not 100% satisfied with your purchase, you can return it within 30 days of the purchase date for a full refund. Our 30-day money back guarantee applies to all of the products we sell, except for: TVs and monitors 20" and larger, Special Order merchandise, or any item indicated as non-returnable. Shipping is not refundable. Prior to returning your purchase, a Return Merchandise Authorization (RMA) number will be provided to you.

Refunds on returned items will be issued in the same payment form as received from the customer at the time of purchase. Once we receive the product and it passes inspection, we will credit your account. Please allow 3 - 6 business days for a credit to appear on your account.

If the item was sent back to us for an exchange, please allow 3 - 5 business days for the replacement to be processed.

No Returns/Exchanges on the following:

TVs and monitors 20" and larger
Special Order merchandise
Any item indicated on the website as non-returnable

For more information see our official Return Policy