MOFR: Multi Output Function Repeaters

MOFR are compact DIN-rail-mounted signal repeater units that convert time sync signals from copper or fibre input to copper and fibre output, providing electrical isolation between equipment being synchronized.

The MOFR receives a source time sync signal on the input side (either TTL, RS2332, RS422 or ST Fibre) and reproduces the signal on the output side:

TTL/232/422 simultaneously
HV switching
ST Fibre Tx
Amplitude Modulated (AM) IRIG-B (from DC IRIG-B input or AM IRIG-B input).

Fibre-based Time Sync Architecture

MOFR are available with fibre receiver and transmitter (repeater) function, facilitating "daisy-chaining". This allows implementation of fully fibre-based sync distribution architecture. This enables a wide variety of IED's to receive sync signals at the voltage levels they require - at a system cost not much greater than copper-based distribution.

DC IRIG-B to AM IRIG-B Conversion

MOFR can be ordered with an option which converts Digital (DC) IRIG-B to Amplitude Modulated (AM) IRIG-B inside the MOFR. This allows digital (DC level-shift) IRIG-B to be reticulated via a single low-cost multimode fibre or CU cable and converted to AM IRIG-B at the location it is required.

Specifications

Input Options

Cu Input = TTL/RS232/RS422 input
AM IRIG-B = AM IRIG-B input
Fibre Rx = 62.5/125um ST fibre Rx

Output Options

L = Low voltage signals:
- TTL = 0-5V, 150mA
- RS232 = +/- 10V, 15mA
- RS422 = +/- 6V, 50 loads
H = High voltage MOSFET switching:
- MOFR01 power terminal is available
- MOSFET = 300V, 1A
- Fibre Tx = 62.5/125um ST fibre Tx
D = DC IRIG-B input to AM IRIG-B output
A = AM IRIG-B input to AM IRIG-B output

Power Supply

Ranges:
- L = 12-36Vdc
- M = 20-72Vdc
- H = 90-300Vdc
Power Drain: 2.25W max (dependent on load attached)

Isolation Properties

2.5kV Input to output
3.5kV Input to power supply
1kV Output to power supply

Physical Properties

Case:
- DIN-rail mount 3 module case — UL94-V0 flame retardant lexan
- 53mm wide x 90mm high x 63mm deep
- DIN rail size = 35mm
I/O terminals: 5mm centres, max wire size 1.5mm dia
Fibre Optic: 700m maximum length fibre between MOFRs

Environmental

Operating temperature: -10°C to +65°C
Humidity: To 95% non condensing

MOFR01 Model Range

MOFR01-2: Cu in/Cu out
MOFR01-5: Fibre Rx/Cu out + Fibre Tx

Options

Logic Output options:
- L = TTL+RS232+RS422 voltage level signals
- H = High Voltage switching MOSFET output
AM-IRIG Output options:
- D = Digital (DC) IRIG-B input to Amplitude-Modulated (AM)
  IRIG-B output
- A = AM IRIG-B input to (AM) IRIG-B output
  IRIG-B output

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