Model 2811-TR/2812-REC

Digital On-Off Fiber Optic Link

The S.I.Tech Model 2811 TR transmits a 10 KHz optical square wave over optic fiber when power is applied and control input shorted. The 2812 receiver detects this optical square wave and turns ON a 4PDT relay. If the fiber cable is removed, broken, or the remote transmitter or local receiver loses power, the relay in the local receiver will turn OFF.

The 4 sets of Form C (4PDT) relay contacts are provided on the rear panel via screw terminal blocks. The power input (+12 VDC or +24VDC) is also via screw terminals.

The fiber optic input/output is provided on the rear panel via ST receptacles, 905/906 compatible SMA receptacles are available as an option.

The front panel contains 2 indicator LEDs, a power ON indicator and a CARRIER (10 KHz detected) indicator.

Specifications

Operation Mode:	Simplex
Operating Wavelength:	820 nanometers (1300 nm option)
Transmission Distance:	See distance chart
Optical Connector:	ST or SMA
Power Requirements:	See Chart 1
Input/Output:	See Chart 2
Optical Power Budget:	10 dB
Operating Temperature:	0 °C to 50 °C
Altitude:	Less than 10,000 ft.
Plastic Enclosure:	6" x 6.5" x 2.75" (15.2 x 16.5 x 7 cm)
Weight:	2lbs. (1 kg)

Operating Distance for Fiber Optic Cable

Chart 1: Maximum Power Requirements

Chart 2: 2811and 2812 I/O Ratings