FT10MxLR
650 nm DC-10 MBd RedLink®
Fiber Optic Transmitter
Datasheet
FT10MxLR Revision H
1
DESCRIPTION
The Firecomms DC to 10 MBd low current RedLink®
transmitter is a highly reliable Resonant Cavity Light
Emitting Diode (RCLED) which operates as a visible
optical source generating red 650 nm light at data
rates from burst mode DC to a maximum of 10 MBd
of continuous digital data. The RCLED is
encapsulated in a lensed clear molded plastic
package for optimum coupling to Plastic Optic Fiber
(POF). It operates over the industrial temperature
range of -40 ⁰C to +85 ⁰C.
The 10 MBd transmitter produces higher optical
power for the same input current relative to the
standard Firecomms 10 MBd device (FT10MHNR).
This allows a lower overall current consumption
when used in an existing link design.
The transmitter is assembled in a gray non-
conducting plastic housing requiring low operating
current supporting horizontal, vertical and tilted
housing options. The use of the eye-safe, visible
light simplifies link set-up and testing.
AVAILABLE OPTIONS
Table 1
ORDERING INFORMATION / PART NUMBERS
10 MBd Horizontal Package
Non-Inverting, TTL
FT10MHLR
10 MBd Vertical Package
Non-Inverting, TTL
FT10MVLR
10 MBd Tilted Package
Non-Inverting, TTL
FT10MWLR
FEATURES
• Visible RCLED at red wavelength (660 nm)
• Optimized for data transmission from
DC to 10 MBd with low current consumption
• Ideal for use with Step Index (SI) Plastic Optic
Fiber (POF)
• Industrial temperature range -40 ⁰C to +85 ⁰C
• RoHS compliant
• Flame retardant (UL 94 V-0) connector
housings
• Low pulse width distortion
• Horizontal, Vertical and 30⁰ Tilted options
available
• Compatible with Versatile Link cables and
connectors
APPLICATIONS
Table 2
APPLICATIONS
Application
Automation and Industrial Control, Low-
Speed Serial Communications, Voltage
Isolation
Standard
Serial RS232, RS485, CAN Bus, Modbus,
Profibus, Sercos
Distance 50 meters Step Index (SI) POF
[1]
Speed DC to 10 MBd
Note: 1. Depending on the installation conditions and
assuming a Firecomms 10 MBd receiver
FT10MxLR Revision H
2
SPECIFICATIONS
1, TD +
2, TD -
3, N.C.
4, N.C.
8, Gnd
5, Gnd
FIGURE 1
Transmitter pin-out, top view
Table 4
REGULATORY COMPLIANCE
Parameter Symbol Standard Level
Electrostatic Discharge,
Human Body Model (contact ESD)
HBM Mil-STD-883 Level 2 (4 kV)
Radiated Emissions Immunity Vm
-1
IEC 61000-4-3 15 Vm
-1
UL Certification UL 60950-1 File No. E362227
Storage Compliance MSL J-STD-020 2a (4-week floor life)
Restriction of Hazardous
Substances Directive
RoHS Directive 2011/65/EU Certified compliant
RECOMMENDED APPLICATION CIRCUIT
1
2
3
4
C2
Vcc
(5 V)
DATA
1/2 SN75451
C1 R2 R1
Value Tolerance
R1
2 k
Ω
5%
R2
100
Ω
1%
C1
0.1
µ
F
20%
C2
10
µ
F
20%
8
5
FIGURE 2
Recommended transmitter application circuit. See note 6 Table 6
Table 3
TRANSMITTER PIN DESCRIPTION
Pin
Name
Symbol
1 RCLED ANODE TD +
2 RCLED CATHODE TD -
3 Not Connected N.C. / GND
4 Not Connected N.C. / GND
5 Retaining Pin GND
8 Retaining Pin GND