56 Keysight 34921A-34925A User’s Guide
34923T-002 Terminal Block for One-Wire Mode 
This terminal block with screw-type connections is labeled with the model number 
and the abbreviated module name. In addition, space is available on the label for 
you to write the slot number.
All modules that connect to the internal DMM are interlock protected. This 
means that when an installed module is exposed (no terminal block or cable is 
connected), the Analog Bus relays are open and disconnected from the Analog 
Buses. See “Safety Interlock” on page 19 for further information. 
If you are using an Keysight terminal block to connect your DUT to this module 
be sure to use the 34923T-002 terminal block that corresponds to the 1-wire 
configuration mode. An error will not be generated if you have installed a 
terminal block that doesn't match the present module configuration.