VXi EX7000 User Manual

VXI Technology, Inc. 

38 

EX7000 Series Web Page Operation 

 

Connecting latching devices to any bank of the RDB will dictate that bank must be operating in 
pulse mode. Commanded by software, the latch signal driving the FET will change state to 
activate FETs and then change state back when the settling time is reached. All Relay Control 
Drive bits within a bank will change state at the same time. Certain latching devices will require a 
reset signal to move all latches to a known state prior to a new state is applied. The Reset signal 
will be a pulse with the same duration as the Relay Control Drive. The pulse width should exceed 
the settling time specification for the relays being used. This value will be used as both pulse 
width and settling time. 

 

NOTE 

There is no current monitoring capability on the EX7000. It is the user’s responsibility to estimate 
the total current requirement and provide sufficient power supply current. 

The user can mix and match non-latching and latching devices among the banks. For instance, 
bank 1 and 3 can be all latching, bank 2 can be non-latching. The RDB, if set up properly, will be 
able to control all of the devices. 

In case of multiple RDBs, all devices in different boards can be controlled in parallel as long as 
the current requirement is met. The user does not have to wait for one RDB to finish its operation 
before moving to the next. On the contrary, the user can also control one RDB at time. The settling 
time in case of multiple RDB will be the longest between the boards, multiply with the aggregate 
number of banks connecting to latching devices.