Electronic assembly supported by a plurality of cards

1. A subsea electronics module for use in a subsea well installation, said subsea electronics module comprising:

a backplane connecting a plurality of slots;

a plurality of physical cards each supporting an electronic assembly having an identical architecture including a programmable logic module and a memory, the physical cards each being inserted into a respective slot of the backplane;

wherein the identical electronic assembly of each physical card is configured by program instructions stored in the memory thereon to be configured to perform in use a set of electronic functions of one of a plurality of different defined card roles in dependence on either one or both of:

the position of the slot into which that card is inserted;

an indication of a card role configuration selection for that card; and

wherein the indication of a card role configuration selection for that card is set at the time of deployment of the subsea electronics module.

2. The subsea electronics module as claimed in claim 1 , wherein identical electronic assemblies of the physical cards inserted into different slots are configured to perform the different sets of electronic functions of different defined card roles.

3. The subsea electronics module as claimed in claim 1 , wherein the memory of each physical card stores program instructions for configuring the physical card to perform the sets of electronic functions of a plurality of card roles.

4. The subsea electronics module as claimed in claim 1 , wherein the plurality of card roles are usable to configure the subsea electronics module to interface with different wellhead equipment.

5. The subsea electronics module as claimed in claim 4 , wherein the architecture of the identical electronic assembly generically combines the hardware necessary to interface with the supported different wellhead equipment.

6. The subsea electronics module as claimed in claim 5 , wherein for each card role, the program instructions configure the generic electronic assembly of the card to emulate the set of electronic functions necessary to interface with a given wellhead equipment of a given equipment manufacturer.

7. The subsea electronics module as claimed in claim 5 , wherein a physical card inserted into a slot having only one permitted card role according to the configuration mapping, defaults to that card role.

8. The subsea electronics module as claimed in claim 1 , wherein the plurality of card roles are usable to configure the subsea electronics module to interface with different wellhead equipment from different equipment manufacturers.

9. The subsea electronics module as claimed in claim 1 , wherein the memory of each physical card stores card role configuration mapping data for the subsea electronics module defining for each slot of the backplane one or more permitted card roles.

10. The physical card supporting an electronic assembly for use in slot of a subsea electronics module as claimed in claim 1 , comprising:

a programmable logic module; and

a memory storing program instructions for configuring the electronic assembly to perform in use a set of electronic functions of one of a plurality of different defined card roles in dependence on either one or both of:

the position of the slot into which that card is inserted;

an indication of a card role configuration selection for that card.

11. A subsea electronics module for use in a subsea well installation, said subsea electronics module comprising:

a backplane connecting a plurality of slots;

a plurality of physical cards each supporting an electronic assembly having an identical architecture including a programmable logic module and a memory, the physical cards each being inserted into a respective slot of the backplane;

wherein the identical electronic assembly of each physical card is configured by program instructions stored in the memory thereon to be configured to perform in use a set of electronic functions of one of a plurality of different defined card roles in dependence on either one or both of:

the position of the slot into which that card is inserted,

an indication of a card role configuration selection for that card;

wherein the plurality of card roles are usable to configure the subsea electronics module to interface with different wellhead equipment;

wherein the plurality of card roles are usable to configure the subsea electronics module to interface with different wellhead equipment from different equipment manufacturers; and

wherein a physical card inserted into a slot having only more than one permitted card role according to a configuration mapping thereof, is further specified by an indication of a card role configuration selection from the permitted card roles.

12. A subsea electronics module for use in a subsea well installation, said subsea electronics module comprising:

a backplane connecting a plurality of slots;

a plurality of physical cards each supporting an electronic assembly having an identical architecture including a programmable logic module and a memory, the physical cards each being inserted into a respective slot of the backplane;

wherein the identical electronic assembly of each physical card is configured by program instructions stored in the memory thereon to be configured to perform in use a set of electronic functions of one of a plurality of different defined card roles in dependence on either one or both of:

the position of the slot into which that card is inserted,

an indication of a card role configuration selection for that card;

wherein the memory of each physical card stores card role configuration mapping data for the subsea electronics module defining for each slot of the backplane one or more permitted card roles; and

wherein a physical card inserted into a slot having only more than one permitted card role according to the configuration mapping, is further specified by an indication of a card role configuration selection from the permitted card roles.