Desktop Steel Shell 1-4 Channel Dry Contact Optic Fiber Modem

This 1-4* dry contact optic fiber modem is a pure dry contact (alarm quantity) desktop steel shell optical terminal, providing 1-4 channels of unidirectional dry contact or 2 channels of bidirectional dry contact transmission in optical fiber. This product solves the problems of electromagnetic interference, ground ring interference and lightning damage, improves the reliability, security and confidentiality of data communication, and can be widely used in various industrial control, process control and traffic control occasions, especially suitable for banks, power and departments and systems with special requirements for electromagnetic interference environment.

● Integrated circuit based on independent intellectual property rights

● Can support unidirectional 4*dry contactand bidirectional 2*dry contact

● Each channel has a dry contactopen and closed indicator light status indication

● Input dry contactopen and closed automatically detect, when the input state is what, the dry contact output is what state, convenient project opening

● The dry contactis stable when the power is on or the optical fiber is not connected, and there will be no random action state

● The normally open and normally closed state of the output dry contactwhen the optical fiber is not connected can be set through the DIP switch

● The dry contactinterface lightning protection reaches IEC61000-4-5 (8/20μS) differential mode: 6KV, impedance (2Ω); common mode: 6KV, impedance (2Ω) standard

● The power supply supports super lightning protection function: lightning protection, can resist inductive high voltage, surge protection, etc.; fanless efficient heat dissipation, reducing repair time;

● DC power supply, can be DC7-12V wide range power supply; anti-reverse connection protection

● Provide wall mounting method;

● Fiber  

Optical port：1

Optical Fiber：Single/Dual fiber

Fiber interface：SC/FC/ST Optional

Wavelength：850nm/1310nm Multimode；1310nm/1550nm Single mode

Relay-free transmission distance: 20~120Km

Typical transmit power: 

Single mode 1310/1550nm: ≥-9dBm

Multimode 850nm: -18dBm

Multimode 1310nm: -25dBm

Receiving sensitivity range: -28dBm~- 40dBm

● Dry contact Interface  

Output interface type:

Dry contact: signal relay dry contact output, 30VDC/1A;

Pulse quantity (wet contact): optical MOS relay output, 0-VCC (VCC is the power supply voltage of the machine), 245VDC/0.12A

Response time: dry contact output: <1.2ms; wet contact output <0.6ms

Maximum switching frequency: dry contact output: 50Hz, wet contact: 1KHz

Output surge protection: dry contact: none; wet contact: TVS+TSS protection

● Working Environment

Working temperature: -40℃—+85℃

Storage temperature: -40℃—+85℃

Working humidity: 0%—95% (non-condensing)

MTBF: >100,000 hours