Rockwell Automation 8520 9/Series CNC Integration Maintenance Manual Documentation Set - Manual (Page 493)

Section 9A
Operator Interface
9A-26
There are three versions of the Pushbutton MTB panel available for use
with the 9/Series controls.
Standard MTB panel -- fiber optic (MTB2)
MTB Panel with LED Lamps -- fiber optic (MTBL)
MTB with LED lamps-- direct inputs /outputs (MTB24)
The first two of these panels are identical except for the type of
illumination in the push buttons. They both are a combination of machine
tool builders (MTB) pushbutton panel and a fiber optic I/O module. This
combination provides the push-button MTB panel with direct fiber optic
communication to the control.
The third type of MTB panel does not have the fiber optic interface
module, but provides connection from the panel using direct 24 V DC
inputs and outputs. An external Fiber Optic interface device is required to
provide an interface to the control. This panel uses LEDs for the
Pushbutton lamps. This version of the MTB panel is used where complex
switching of the signals between several CNCs is required.
9A.4
MTB Panels