Serial to Fiber Optic Converters
Serial to Multi-Mode Fiber at the Right Price

FOSTCDR
Extending communications up to 2.5 miles is the job of B&B Electronics’ FOSTCDR line. Why pay more for features or distance you don’t need? If your application requires the fiber optic light to be off in the idle state, choose the FOSTCDR-INV. Rugged dependability is yours - at our best price
Specifications
- RS-232/422/485 to multi-mode ST fiber optic conversion
- 2-way optical isolation, 2 KV on input/output
- Wide temperature operation (-40 to +80°C)
- Modbus compatible
- Multi-mode ST connectors
- Operates on 10-30 VDC
- Panel mounts with optional brackets
- Automatic Send Data Control
- LED indicators for power and data
- UL recognized (FOSTCDR only)
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Model No.
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Description
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FOSTCDR
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RS-232/422/485 to multi-mode fiber optic converter, ST
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FOSTCDR-inv
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RS-232/422/485 to multi-mode fiber optic converter, ST
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| FOSTCDRKT |
Kit: (2) FOSTCDR converters, (2) 24VDC power supplies, (2) cables
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You may also need....
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MDR-20-24
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24VDC, 1A DIN Rail Power Supply, Slimline | |
| DFMM-STST-1M | Multi-mode Fiber Optic Cable, 1m | |
ILinx™ Triple Isolation and Up To 40 Km
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FOSTCDRI ![]() |
FOSTCDRI-SC ![]() |
Our ILinx fiber converters are packed with functionality you need in heavier industrial environments. ILinx FOSTCDRi-SC extends communication up to 9 miles (15 km). If you need cUL Class 1 Div 2 certification, select ILinx FOSTCDRi model
Specifications
- RS-232/422/485 to fiber optic conversion
- 3-way optical isolation, 2 KV on input/output and power
- Wide temperature operation (-40 to +80°C)
- Modbus compatible
- Multi-mode (ST) or Single-mode (ST or SC) options
- Wide range operation on 10-48 VDC
- Panel mounts with optional brackets
- Supports Fiber Ring Functionalities
- Automatic Send Data Control
- LED indicators for power and data
- Multi-mode = 2.5 mi. (4 km)
- Single-mode = 9 mi. (15km)
- Switchable termination and biasing
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Model No.
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Description
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FOSTCDRI
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Triple Isolated RS-232/422/485 to multi-mode converter, ST
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FOSTCDRI-SC
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Triple Isolated RS-232/422/485 to single-mode converter, SC
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| FOSTCDRI-ST |
Triple Isolated RS-232/422/485 to single-mode converter, ST
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ILinx™ Hardened – Shock and Vibration Tested For Your Toughest Applications
![]() FOSTCDRI-PH-SC |
FOSTCDRI-PH-MT |

FOSTCDRI-PH-MC
ILinx™ Hardened meets the demands of Electrical Substations, Subway Tunnels, and other tough environments. The IP30 metal panel mount enclosure lets this fiber converter handle the abuse. 1.2kϘÜ Transmit/Receive and Termination at 120
Specifications
- RS-232/422/485 to fiber optic conversion - with heavy-duty specifications
- 3-way isolation: 2KV on data ports and power circuits
- Wide temperature operation (-40 to +80°C)
- Modbus compatible
- IEEE 61850-3 & IEEE 1613
- Removable terminal block for serial connection
- Wide range operation on 10-48 VDC
- DIN rail mounts with optional bracket
- Multi-mode fiber extends communications to 4kM; single-mode (to 15kM)
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Model No.
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Description
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FOSTCDRI-PH-MC
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Hardened RS-232/422/485 to multi-mode fiber optic converter, SC
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FOSTCDRI-PH-MT
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Hardened RS-232/422/485 to multi-mode fiber optic converter, ST
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| FOSTCDRI-PH-SC |
Hardened RS-232/422/485 to single-mode fiber optic converter, SC
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