The OP7822 is a digital I/O conditioning board designed to fit in the back slots of the OP7000 chassis. It comes in two option OP7822-1 and OP7822-2, which are different assemblies of the same baseboard with different receiver configuration.

The board holds 12 optical transceivers and converts 6 logic signals into 6 fiber optic signals (transmit channels), and 6 fiber optic signals into 6 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 ST-ST plastic-clad-silica (PCS) fibers (820nm wavelength). Their frequency range is 100kBd to 50 MBd for distances up to 1000 meters. 

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. The OP7822-2 is compatible with the IEC-60044-8 (HDLC) protocol.

Installation

The OP7822 fiber optic module must be inserted in the back of the OP7000 simulator, making sure that the board is properly aligned using the guide tracks before pressing it into place.

The corresponding front slot may be empty or may hold an OP7353 monitoring board.

Front Plate

The front plate features 6 groups of transmit (Tx, output) and receive (Rx, input) transceivers.

The plastic optical fiber cables must hold an ST termination. One cable is required for each transceiver connection.

Specifications

( * ) both options are custom assemblies of the base-board 126-0460.