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The OP8216 is an 1U fiber optic channel interface output (TX) or input (RX) depending on selected configuration.

The board holds optical transceivers and converts logic signals into fiber optic signals (transmit channels), and fiber optic signals into digital logic signals (receive channels).  Hence it ensures optical digital input and output isolation between the OPAL-RT simulator and the unit under test. 

The transceivers are compatible with plastic optical fiber cables (650nm wavelength). Their frequency range is DC to 25 MHz, corresponding to a 50 Mbps baud rate, for distances up to 50 meters. The absolute minimum for transmission (Tx) high and low pulse width is 20ns. This frequency range means the board can be used as a standard digital I/O card with isolation (DC mode), or for low-speed communication protocols. 

Possible configuration are :

Product NameConfigurationDescription
OP8216-16-116 ch. TxDB37 to 16 Fiber Optic Output Interface Panel
OP8216-32-132 ch. Tx2xDB37 to 2x16 Fiber Optic Output Interface Panel
OP8216-16-216 ch. RxDB37 to 16 Fiber Optic Input Interface Panel
OP8216-32-232 ch. Rx2xDB37 to 2x16 Fiber Optic Input Interface Panel
OP8216-32-3

16 ch. Tx/ 16 ch. Rx

2xDB37 to 16 Fiber Optic Input and 16 Fiber Optic Output Interface Panel

Specifications

Product NameOP8216
Product type8TX_8RX_DC_to_50_MBd_Fiber_Optic_link_650nm
Receiver TypeAFBR-2624Z PIN diode
Transmitter TypeAFBR-1624Z 650nm wavelength
Connector TypeAvago’s Versatile Link family
Maximum Tx/Rx Frequency

50Mbps when connected to I/O Mezzanine Board OP5351 and OP5352

10Mbps  when connected to I/O  Mezzanine Board OP5353 and OP5360

Minimum Tx Pulse Width

20 ns

Transmitter Input Electrical Signal

TTL-level compatible +3.3V or +5V.

Receiver Output Electrical Signal

TTL-level compatible +5V.

External power supply 

12VDC ( ±20% ) 10W is required (J1 connector on PCB)

Rack Unit1U
Dimensions18.8 x 16.4 x 4.4 cm (17.43 in x 6.46 in x 1.75 in)
Operating Temperature10 to 40 ºC (50 to 104ºF)
Storage Temperature-55 to 85ºC (-67 to 185ºF)
Relative Humidity10 to 90%, non-condensing
Maximum Altitude2,000 m (6562 ft.)

Channel Description



Minimum high low TX pulse width.png

Example Calculation for Optical Power Budget

In order to ensure that the OP8216 is compatible with different equipment and fiber optic set-ups, an optical power budget must be established and calculated.

An optical power budget involves knowing the following:

  • Fiber optic link distance.
  • Fiber optic link attenuation and loss factor. 
  • Connectors and amplifiers throughout the fiber optic link.
  • Receiver sensitivity.
  • Transmitter power.

For the OP8216, the transmitter has an optical output power of -4.5dBm (min) to +2dBm (max) [for 1mm POF].

The receiver has a sensitivity of -22dBm to +2 dBm.

For 1mm POF, worst-case attenuation can be estimated to be 0.27 dB/m from -40C to +85C at 660nm.

These numbers can be used to present an example of an optical power budget, where the OP8216 transmitter is connected to the OP8216 receiver through a 50m, 1mm POF link. 

Assuming there are no connectors or amplifiers, and that we are using a 50m fiber optic link between the OP8216 transmitter and receiver, we can calculate:

0.27 dB/m * 50m = 13.5 dB losses through 1mm POF.

-4.5 dBm - 13.5 dB = -18 dBm at the receiver.  -18 dBm is within the receiver sensitivity specification, so the link will work properly.

We can thus confirm that this example 50m link would be compatible with the OP8216 transmitter and receiver.

NOTE:  Presented values are used as an example calculation only.  Please replace values with measured and/or known values for your specific application.

OP8216 - 16 Channels Output (Tx) - Front Plate

OP8216 - 16 Channels Input (Rx) - Front Plate


DB37 Pins Assignment

DB37

Connector

Channel and

Signal Name

Screw

Terminal

Connector

DB37

Connector

Channel and

Signal Name

Screw

Terminal

Connector


1

+CH00

+00

20

GND

-00

2

+CH01

+01

21

GND

-01

3

+CH02

+02

22

GND

-02

4

+CH03

+03

23

GND

-03

5

+CH04

+04

24

GND

-04

6

+CH05

+05

25

GND

-05

7

+CH06

+06

26

GND

-06

8

+CH07

+07

27

GND

-07

9

+CH08

+08

28

GND

-08

10

+CH09

+09

29

GND

-09

11

+CH10

+10

30

GND

-10

12

+CH11

+11

31

GND

-11

13

+CH12

+12

32

GND

-12

14

+CH13

+13

33

GND

-13

15

+CH14

+14

34

GND

-14

16

+CH15

+15

35

GND

-15

17



36



18

+5V (out)


37

GND


19






J1 - Power Connector Pin Assignment

Power Connector - J1 Connector

Signal Name

Comment

1

+12V

Silkscreen indication on pcb ( + )

2

GND

Silkscreen indication on pcb ( - )

OP8216-16-1 PCB Connector View


OP8216-16-2 PCB Connector View





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