Extend 4 Wire Voice Frequency Signal Over Fiber Optic Cable
This industrial fiber optic media converter is designed to extend a 4 Wire Voice Frequency signal over fiber optic cable. By extending 4 Wire signals over fiber cable you gain the advantage of sending the signal long distances, up to 120km, as well as gain noise immunity to RF and Electromagnetic Interference.
This system transports one circuit of 600 Ohm 4 Wire Data and supports E&M signaling. The devices can be ordered with dual fiber or single fiber transceivers. The 4 wire data supports constant transmission of voice frequency ranging from 300Hz-3,400Hz which is suitable for a wide range of radio and SCADA circuit applications. This RLH Fiber Link system is designed and made in the USA and covered by our Limited Lifetime Warranty.
- Rugged design, operating temperature range -40°C ~ 70°C
- Transports voice frequency data 300Hz to 3,400Hz
- Supports 600 Ohm audio standard impedance
- Single fiber and dual fiber transceivers available
- Extend the signals long distances, up to 120km over fiber
- Supports E&M signaling
- Built-in alarm relay to indicate system health
- Includes both DIN clip and wall mount ears for easy installation
- System power range options: 24-48VDC or 125 VDC
- Limited Lifetime Warranty
- Made in USA
Standard Model – 24-48VDC
-A Model – 125VDC
6 Watts (Maximum)
ST or SC
Singlemode up to 120km
Multimode up to 2km, supports 62.5μm and 50μm
Analog Bandwidth (Voice Frequency):
300Hz to 3,400Hz
< 20dBrnC (15dBrnC typical)
600 Ohm input and output
0dB +/- 0.5dB each direction
8dBm into 600 Ohms
24-48VDC, 3000Vrms optically isolated
1500VRMS isolation by normally open solid state relay
Closed resistance 35 Ohms (220VAC or 330VDC @ 150mA max.) Open resistance > 1M Ohms
Input to output 15-18ms
System Alarm Output:
Normally Closed / Normally Open (NCNO) Relay
Varistors & Automatic resettable fuses
DC Input Isolation 1.5kV
Powder coated steel and aluminum alloy
Physical Dimensions H 4.93” x W 1.20” x D 3.93” (125mm x 31mm x 100mm)
Standard DIN rail (T-35)
Wall mount (with included ears)
Temperature -40°F to +158°F (-40°C to +70°C)
MTBF 175,000 Hrs. (Circuit Board level)
$530.00 – $810.00
Lead Time: 1 to 2 Weeks*
For product questions, volume pricing and/or delivery outside of the US and Canada, please contact sales.
4 Wire Data with E&M System
|Product configuration||Mode||Connector||Distance||Fibers||Part number||Price||hf:att:pa_mode||hf:att:pa_connector||hf:att:pa_distance|
|Multimode, SC, 2km/1.2 miles, Dual Fiber||Multimode||SC||2km/1.2 miles||Dual Fiber||4D-1EM-03-1||$530.00||multimode||sc||2km-1-2-miles|
|Multimode, ST, 2km/1.25 miles, Dual Fiber||Multimode||ST||2km/1.2 miles||Dual Fiber||4D-1EM-04-1||$530.00||multimode||st||2km-1-2-miles|
|Singlemode, SC, 20km/12.4 miles, Dual Fiber||Singlemode||SC||20km/12.4 miles||Dual Fiber||4D-1EM-40-1||$630.00||singlemode||sc||20km-12-4-miles|
|Singlemode, SC, 60km/37 miles, Dual Fiber||Singlemode||SC||60km/37 miles||Dual Fiber||4D-1EM-41-1||$730.00||singlemode||sc||60km-37-miles|
|Singlemode, SC, 120km/74 miles, Dual Fiber||Singlemode||SC||120km/74 miles||Dual Fiber||4D-1EM-45-1||$810.00||singlemode||sc||120km-74-miles|
|Singlemode, ST, 20km/12.4 miles, Dual Fiber||Singlemode||ST||20km/12.4 miles||Dual Fiber||4D-1EM-50-1||$630.00||singlemode||st||20km-12-4-miles|
|Singlemode, ST, 60km/37 miles, Dual Fiber||Singlemode||ST||60km/37 miles||Dual Fiber||4D-1EM-51-1||$730.00||singlemode||st||60km-37-miles|
|Singlemode, ST, 120km/74 miles, Dual Fiber||Singlemode||ST||120km/74 miles||Dual Fiber||4D-1EM-55-1||$810.00||singlemode||st||120km-74-miles|
|Singlemode, SC, 20km/12.4 miles, Single Fiber – Side A||Singlemode||SC||20km/12.4 miles||Single Fiber – Side A||4D-1EM-10-1||$670.00||singlemode||sc||20km-12-4-miles|
|Singlemode, SC, 20km/12.4 miles, Single Fiber – Side B||Singlemode||SC||20km/12.4 miles||Single Fiber – Side B||4D-1EM-11-1||$670.00||singlemode||sc||20km-12-4-miles|
|Singlemode, SC, 60km/37 miles, Single Fiber – Side A||Singlemode||SC||60km/37 miles||Single Fiber – Side A||4D-1EM-14-1||$770.00||singlemode||sc||60km-37-miles|
|Singlemode, SC, 60km/37 miles, Single Fiber – Side B||Singlemode||SC||60km/37 miles||Single Fiber – Side B||4D-1EM-15-1||$770.00||singlemode||sc||60km-37-miles|
- For the 125VDC input power option, please note your part number, add -A to the end, and get your quote here
- A complete system requires 2 units
- Bi-Directional single fiber models require an A side and B side unit for a complete system
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Transport two 4 Wire Data 600 Ohm voice frequency signals and Contact Closure over fiber.
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Transport two 4 Wire Data 600 Ohm voice frequency signals over fiber.
*Lead times are estimates and may vary. You will be contacted within 1 business day to go over the details of your order. If you require a specific date, let us know!
*Days = Business Days
Warning: This product can expose you to chemicals including arsenic, which is known to the State of California to cause cancer. For more information, go to www.P65Warnings.ca.gov.