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1. GE
Security
Fiber Optic
Data Transmitters and Receivers
Single-Channel
Contact Closure
251D and 2251D
Overview
The Single-Channel Contact Closure fiber links transmit a single
channel of switch/status information or control-function signals.
251D models feature multimode operation, while 2251D models
operate over single mode fiber.
Programmable Outputs
Outputs are Normally Open (NO) and Normally Closed (NC) reed
relays. A complete system consists of a transmitter and a receiver,
configured as standalone units or as rack cards.
Superior Diagnostics
The SMARTS™ diagnostic technology provides system status LEDs
that monitor the status of the data path and the optical signal.
Standard Features
One-way transmission
Single and multimode models available
Single-channel contact closure
FM transmission
Operates up to 3.2 miles (5.2 km) (multimode) or up to 20 miles
(32 km) (single mode)
13 dB optical budget
Optical AGC
SMARTS™ diagnostics
Standalone and rack configurations
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