Modular connector system

1. A connector system comprising:

a first connector comprising a housing holding a plurality of contacts;

a second connector comprising a housing holding a plurality of contacts; and

a metal shield having walls defining a shielded chamber;

wherein the first and second connectors are configured to be mounted to a circuit board in a stacked arrangement next to one another, the first and second connectors are configured to be arranged in a shielded configuration in which the first and second connectors are positioned within the shielded chamber and mounted to the circuit board with the metal shield and the first and second connectors are configured to be arranged in an unshielded configuration in which the first and second connectors are mounted to the circuit board without the metal shield; and

wherein the housings define mating interfaces for mating with corresponding mating connectors, the first and second connectors received in the metal shield without affecting the mating interfaces such that the housings are configured to be mated to the mating connectors in the shielded configuration and in the unshielded configuration.

2. The connector system of claim 1 , wherein the metal shield has an open bottom, the contacts extending through the open bottom for electrical connection to the circuit board.

3. The connector system of claim 1 , wherein the shield is stamped and formed.

4. The connector system of claim 1 , wherein the shield constitutes a die-cast metal shell.

5. The connector system of claim 1 , wherein the metal shield includes tabs extending therefrom, the tabs are configured to engage a complementary metal shield of a mating connector.

6. The connector system of claim 1 , wherein the housing includes alignment lugs configured to be received in alignment slots of a mating connector, the metal shield including channels therethrough that receive the alignment lugs.

7. A connector system comprising:

a first connector comprising a housing holding a plurality of contacts;

a second connector comprising a housing holding a plurality of contacts; and

a metal shield having walls defining a shielded chamber;

wherein the first and second connectors are configured to be mounted to a circuit board in a stacked arrangement next to one another, the first and second connectors are configured to be arranged in a shielded configuration in which the first and second connectors are positioned within the shielded chamber and mounted to the circuit board with the metal shield and the first and second connectors are configured to be arranged in an unshielded configuration in which the first and second connectors are mounted to the circuit board without the metal shield; and

wherein the housings each include a receptacle cavity, the metal shield includes a front edge with clips extending therefrom, the clips include spring fingers extending therefrom into the receptacle cavities of the housings, the spring fingers being configured to engage a complementary metal shield of a mating connector received in the corresponding receptacle cavity.

8. The connector system of claim 7 , wherein the metal shield has an open bottom, the contacts extending through the open bottom for electrical connection to the circuit board.

9. The connector system of claim 7 , wherein the shield is either a die cast metal shell or a stamped and formed metal shield.

10. The connector system of claim 7 , each housing includes a lip, the metal shield includes an edge received between the lip and the housing.

11. The connector system of claim 7 , wherein the metal shield includes tabs extending therefrom, the tabs are configured to engage a complementary metal shield of a mating connector.

12. The connector system of claim 7 , wherein the housing includes alignment lugs configured to be received in alignment slots of a mating connector, the metal shield including channels therethrough that receive the alignment lugs.

13. A connector system comprising:

a first connector comprising a housing holding a plurality of contacts;

a second connector comprising a housing holding a plurality of contacts; and

a metal shield having walls defining a shielded chamber;

wherein the first and second connectors are configured to be mounted to a circuit board in a stacked arrangement next to one another, the first and second connectors are configured to be arranged in a shielded configuration in which the first and second connectors are positioned within the shielded chamber and mounted to the circuit board with the metal shield and the first and second connectors are configured to be arranged in an unshielded configuration in which the first and second connectors are mounted to the circuit board without the metal shield; and

wherein each housing includes a lip, the metal shield includes an edge received between the lip and the housing.

14. The connector system of claim 13 , wherein the metal shield has an open bottom, the contacts extending through the open bottom for electrical connection to the circuit board.

15. The connector system of claim 13 , wherein the shield is either a die cast metal shell or a stamped and formed metal shield.

16. The connector system of claim 13 , wherein the metal shield includes tabs extending therefrom, the tabs are configured to engage a complementary metal shield of a mating connector.

17. The connector system of claim 13 , wherein the housing includes alignment lugs configured to be received in alignment slots of a mating connector, the metal shield including channels therethrough that receive the alignment lugs.