Contact Closure Systems
FiberPlex FOC-2204 4-Channel, Bi-Directional, Multi-Drop Capable, Contact Closure-over-Fiber Optic Converter. Industrial Grade, DIN Rail Packaging

This FiberPlex unit Transmits Four (4) Wet or Dry Contact Closure Channels, Bi-Directionally over a Fiber for industrial transport of alarm, signaling or controls and support point-to-point, multi-drop or ring topologies.

• Ideal for Industry - Suitable for installation in critical, high voltage, remote or un-manned locations operating 24x7.
• Variety of Use-Cases - Supports alarm event triggering, building automation, environmental control systems, fire & alarm systems, gate control, traffic signal and control equipment.
• Contact Closure Inputs - Inputs are available with Dry Contact sensors or Voltage sensing (wet) inputs (Custom voltage ranges available) and each Input is optically isolated.
• Output Relays - Output relays are integrated with three-position screw-down terminal blocks that enable the user to choose as Normally Open or Normally Closed (NO or NC). Each Output Relays relay is paired with an input contact on the opposite end of the system. Each output relay is rated for 60 Watts. Alarm contact for system status monitoring.
• Supports Multi-Drop or Ring - Dual fibers enable support multidrop or ring topology with TX/RX breakouts available on dual fiber SFPs.
• Rugged Industrial - Hardened to operate in -40°C to +70°C (-40°F to +158°F) and packaged in a compact DIN rail mount enclosure, that can also be wall mounted (Wall Mount ears included).
• Flexible Powering - Redundant DC Power Inputs (12~48VDC).
• Fiber Interface Flexibility - SFP receptacles offer a variety of Fiber Transport options. Compatible with all MSA compliant Gigabit SFPs. Pluggable terminal blocks for copper connectivity.
• Standards Compliant - NDAA, TAA, FCC Class A, CE, RoHS, and REACH compliant.
• US Made - Designed, Engineered and Manufactured in the USA.

The FiberPlex FOC-2204 Series is a 4-Channel, Bi-Directional, Contact Closure-over-Fiber Converter that provides bi-directional transmission of the contact closure signals over fiber using dual fiber SFPs.  The device can support point to point, multi-point and ring topologies.

Applications include alarm event triggering, building automation, environmental control systems, fire & alarm systems, gate control, traffic signal control equipment, and more.

By utilizing fiber optic cable, the 4 Channel Bi-Directional Contact Closure DIN Fiber Link system provides absolute electrical isolation between both ends of the network. It is immune to EMI/RF interference, ground loops, and high voltage surges from lightning or ground faults, and is ideal in electrically noisy environments such as near large power sources, electrical motors, and radio communications equipment.

Additionally, the contact closure system allows the use of fiber cable infrastructure to transport relay alarms to and from locations over distances of up to 120km, depending on the SFP transceiver being used. Using a fiber optic contact closure system can simplify messaging and eliminate the need for a PLC or IED to transport the status of remote alarms and IO.

The Contact Closure Inputs will either sense a dry contact closure or a wetting DC voltage signal depending on the model. The output relays have both normally closed and normally open terminals available for each relay. Each unit features an NC/NO system alarm contact for system monitoring, and convenient LED indicators to view system status.