OPL-1B SERIES Optical Fiber Pulse Link

OPL-1B Optical Fiber Pulse Link

The OPL-1B optical fiber pulse link system is a transmitter/receiver pair that uses fiber optic cable to send metering pulses over long distances. Substation-hardened solutions are available for both multimode and single mode fiber ranging up to 68 miles.

The OPL-1B is a 1-channel system designed to use multimode or single mode fiber with standard ST connectors. Maximum pulse transmission distances vary based on the fiber optic cable and optical media converters used. The OPL-1B system makes it possible to quickly implement an optical pulse link with minimal effort and includes the power supply, wetting voltage, isolation relay and terminal block connectors making it possible to have the optical link up and running in minutes. The system does not include the fiber optic cable.

Each OPL-1B is made up of an OPT-1B transmitter and an OPR-1B receiver. The OPT-1B transmitter is designed to receive pulses from an electric meter’s dry-contact KYZ pulse initiator. Pulses are conditioned and sent by the fiber cable to an OPR-1B receiver where the pulse information is validated and implemented into the correct pulse state. The input can be configured as either Form A (2-wire) or Form C (3-wire). An OPT-1B transmitter requires an OPR-1B receiver.

Bright red and green LEDs monitor the input status to the OPT-1B transmitter and provide easy & immediate visual system checking without additional test equipment. An incorrect sequence of input pulses will not be recognized and only the first valid pulse of the sequence will be transmitted. While the OPT-1B transmitters are primarily designed for the transmission of metering pulses, it is capable of transmitting any desired Form A or C contact closure such as a relay, switch, breaker status, etc. to an OPR-1B receiver.

The OPR-1B receiver also includes bright red and green LEDs to monitor the KYZ output status. The OPR-1B features a solid-state Form C Contact relay (SPDT) for a no-bounce contact with internal transient suppression circuitry to eliminate contact wear and noise.

  • OPT-1B-1 Transmitter, OPR-1B-1 Receiver, ordered separately, multi-mode fiber, 0-2.5 miles
  • OPT-1B-2 Transmitter, OPR-1B-2 Receiver, ordered separately, multi-mode fiber, 1-9 miles
  • OPT-1B-3 Transmitter, OPR-1B-3 Receiver, ordered separately, single-mode fiber, 0-14 miles
  • OPT-1B-4 Transmitter, OPR-1B-4 Receiver, ordered separately, single-mode fiber, 10-50 miles
  • OPT-1B-5 Transmitter, OPR-1B-5 Receiver, ordered separately, single-mode fiber, 10-68 miles
  • *By special order only

Power Input: 120, 208-277 VAC. Burden: 4 VA
Signal Input:
Optical fiber input from OPT-1B transmitter; One Form C (KYZ) input from the sending device to the OPT-1B transmitter
One Form C (KYZ) solid state, dry contact output from the OPR-1B receiver
Maximum Pulse Rate: OPR-1B: >40 Pulses per second (Form C), 20 pulses per second (Form A)
OPT-1B: >200 Pulses per second (Form C), 100 pulses per second (Form A)
Maximum Output Voltage: 250 VAC
Maximum Output Current: 1/4 Amp
Maximum Power Rating: 25 VA
Sense Voltage: +13VDC provided to the sending device(s)
Contact On-State Resistance: 5 ohms maximum, 3 ohms typical
Switching Time: Turn On: 8 milliseconds typical
Turn Off: 1 milliseconds typical

Mounting: Any position
Size:5.5’’ wide, 9.5’’ high, 3.5’’ deep
Weight:2 pounds

Temperature Range:

-38º C to +70º C, -38.4º F to +158º F

Humidity: 0 to 98% non-condensing

Available Options
Input Voltages: Contact Factory
Enclosure: NEMA 4X raintight and dustproof enclosure available. 12.0” high, 10.0” wide, 6.0” deep
Fiber Long distance single-mode model available by special order