Specifications

RIGOL
M300 Selection Guide 11
Multiplexer and Terminal Block
M300 provides 4 kinds of multiplexer modules as well as 4 kinds of external terminal blocks for the
multiplexer modules to connect the signals under test in 1-wire, 2-wire and 4-wire connection modes.
Table 3 Multiplexers and the Corresponding Terminal Blocks and Connection Modes
Module
Terminal Block
Supported Connection Mode
MC3120
M3TB20
2-wire and 4-wire
MC3132
M3TB32
MC3164
M3TB64
1-wire
MC3324
M3TB24
2-wire and 4-wire
1. MC3120 and M3TB20
MC3120 is a 20-channel multiplexer. All the 20 channels switch both HI and LO inputs, thus providing
fully isolated signals for the DMM module. MC3120 is divided into two banks (called A and B) with 10
two-wire channels for each bank. When making 4-wire resistance measurement, the instrument
automatically pairs the channels of A bank and B bank. All the channels added into the scan list are
break-before-make. You can close multiple channels on this module when you have not configured
any channel to be part of the scan list.
MC3120 can be connected with MC3065 (the DMM module, if MC3065 is currently inserted).
For the technical specifications of this module, please refer to the User’s Guide or Data Sheet of this
product.
MC3120 is as shown in the figure below.
Figure 8 MC3120
M3TB20 is an external terminal block applicable to MC3120. Its appearance and detailed layout are
as shown in the figure below. There are 20 pairs of connecting terminals from the lower-left corner
to the upper-right corner corresponding to the 20 channels of MC3120 respectively. The connecting
terminals can be recognized via the labels (CH01 to CH20) below or above them.
Figure 9 M3TB20