The GX6377 contains high-power switching relays and two groups of 16x2 switch matrix for small signal switching. The high-power switching relays consist of 5 high current Form A SPST relays, 4 Form A SPST relays and 4 Form C relays. The Switch Matrix has a basic configuration of two groups of 2x16 and can be programmatically configured as one group of 2x32 or configured through jumpers as 4x16. The GX6377 architecture is shown in the figure below:
GX6377 Architecture
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GX6377 High Current (SPST) Relay
When the relay is activated, the Change Over (CO) terminal is connected to the Normally Open (NO) terminal. When the relay is deactivated, the CO terminal is disconnected. After the board is reset, all relays are deactivated.
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GX6377 Form A (SPST) Relay
When the relay is activated, the Change Over (CO) terminal is connected to the Normally Open (NO) terminal. When the relay is deactivated, the CO terminal is disconnected. After the board is reset, all relays are deactivated.
The GX6377 has 4 Form C Single Pole Double Throw (SPDT) relays (see the figure below).
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GX6377 Form C (SPDT) Relay
When the relay is activated, the Change Over (CO) terminal is connected to the Normally Open (NO) terminal. When the relay is deactivated, the CO terminal is connected to the Normally Closed (NC) terminal. After the board is reset, all relays are deactivated.
These relays have a self-cleaning property when enough current flows between contacts. To ensure this occurs, the relays must be used for power switching. Without the minimum current, the action will not occur and the contact resistance will not meet the specifications.
The GX6377 has 2 switching groups A and B. There are two rows per group and 16 relays per row for a total of 32 per group and total of 64 relays per board.
The Switch Matrix can be configured as follows:
Basic (default) configuration of two groups of 2x16:
Columns 0 through 15
GX6377 Typical Switching Group
Configuration programmed to one group of 2x32:
The Switch Matrix configuration can be programmed to change the configuration to one group of 2x32.
Columns 0 through 31
GX6377 Typical Switching Group
All the columns in Groups A and B can be connected via jumpers creating a 4x16 switch matrix. There is a jumper header block of 16 jumpers used for connecting the 16 columns to their adjacent group. The figure below shows jumper headers for groups A to B with JP1.
Columns 0 through 15
GX6377 A and B Groups Jumpers
All the shielding on the GX6377 board is connected to a chassis signal. JP1 can be installed to connect the chassis and Ground.