ADLINK PCI-7256 - Manual (Page 33)

Operation Theorem • 25
RESET condition control bits as (0,1). For more details about the latching
relay control register, refer to section 3.3.
PCI-7256 also provides a software function for user to control the latching
relays. Using this function, relay control is as simple as the general relay.
Instead of writing 32-bit data to the relay output register, user only needs to
prepare 16-bit data and each bit represents a relay’s status. Value ‘1’
represents SET condition and value ‘0’ represents RESET condition. For
more details about the relay output function library, refer to section 5.3.
The relay output contacts are rated for a maximum of 0.5A at 125V
AC
(resistive), or 1A 30V
DC
. You should reduce these ratings for inductive loads.
For more detailed information of relay contact, please refer to Appendix A.