PXI-2527 Switch and TB-2627 Dual 32x1 Configuration

[okbovee]

Looking to configure the PXI-2527 in the dual 32x1 configuration using a TB-2627 terminal block.  Under the NI Switches Help for NI PXI/PXIe-2527 1-Wire Dual 32×1 Multiplexer Topology -

(link - http://zone.ni.com/reference/en-XX/help/375472C-01/switch/2527_dual_1-wire_32x1_mux/) it shows the software names for the various pin numbers.  I don't actually care about this because I'm using the terminal block, but what concerns me is that the diagrams depict Ch0-Ch31 connecting to com0+ and Ch32-Ch64 to com1+ and there is NO mention of com0- or com1-.  However, in the NI TB-2627 Installation instructions, Table 4 shows the Dual 32x1 1-Wire Topology Terminal Mapping.  In this mapping IT DOES list a software name and Terminal Name for com0- and com1-. 

My question is, if com0- and com1- are not listed in the switch manual why are the listed in the TB-2627 manul and what is there use in this configuration? 

Thanks for your time. 

[Kyle_K · Accepted solution]

In the TB-2627 installation instructions for the Dual 32x1 configuration, it mentions Com0- and Com1- just as a reference to inform the user what pins it connects to since this same module can be used with other topologies. This is unnecessary information for the Dual 32x1 topology since the switch card does not use those channels for that particular topology. The information is available for your reference but do not neet to be connected to anything.

Please let me know if any of this is unclear.

Kyle K.

[okbovee]

Great, that's what I was hoping to hear.  Just wanted to make sure I didn't need to be connected Com0- and Com1- for any purpose with that topology.