User`s guide

Section 2 – MultiMux Operation and Installation 5
2.1 Operation Details
The MultiMux is controlled by the CR10 or CR10X Controller using 2 digital control signals. The operation
of the MultiMux is simple enough so that virtually any device capable of controlling 2 digital TTL/CMOS
type signals can be used to control the multiplexer. Generally speaking the timing diagram depicted below
describes how the 2 digital signals are used to control the MultiMux.
Enable
Clock
Channel 1No Channel
Selected
No Channel
Selected
Channel 15
SelectedSelected
Channel 2
Selected
1 2 15 16
Channel 16
Selected
Note: Timing values shown are minimum values.
50ms
250ns
250ns
In the case of the 32 or 48 channel modes the maximum number of pulses to advance through all the
channels would be 32 and 48, respectively.
The channel switching mode is selected by configuring the DIP switch mounted on the MultiMux relay
board (mounted under the terminal board). The table shown below describes the 4 possible
configurations.
DIP Settings Mode Description
16 Channel Standard mode for switching 4 or 6-wire instruments (default).
32 Channel Switching 32 2-wire instruments.
48 Channel Switching 48 2-wire instruments (optional).
DaisyMux Mode where control signals are common to more than 1 multiplexer.
See section 2.8 for more information on DaisyMux mode.
The factory default setting is 16 Channel mode (unless specified otherwise).