This unit stacks on top of the 81501 to support additional chambers. There are no cards to install or cables to connect between modules.
This unit is functionally identical to the Model 81501 with all the features of that unit. Physically, it simply stacks on top of the Model 81501 to support additional chambers with a single computer and single copy of the ABET II Software. There are no cards to install or cables to connect between modules. Standard DB-25 cables connect between the interface and the chamber I/O connection block.
