Rockwell Automation 8520 9/Series CNC Integration Maintenance Manual Documentation Set - Manual (Page 500)

Section 9A
Operator Interface
9A-33
Power Supply Specifications
Table 9A.N lists the power requirements for the MTB I/O module.
Table 9A.N
MTB I/O Module Power Requirements
Item Specifications
Rated Input Voltage 12V dc
Power Source Voltage Range 11.5-13.2V dc
Power Consumption 1.3 A typical, 2.6 A maximum
Input Specifications
Table 9A.O lists the input specifications for the circuit that receives the
signals from the pushbuttons and the selector switches on the push-button
MTB panel.
Table 9A.O
MTB I/O Module Input Specifications
Item Specifications Remark
A-B MTB Panel Custom MTB Panel
Number of Input Points 54 44 Total input signals from all switch groups
Modal Group 19
Discrete I/O 18
Rotary Input 8
Interconnect Group 6
Unused 3
All MTB Panels
Operating Voltage
ON
11.5 to 13.2 V dc
OFF 0-2V dc
Allowable Voltage Drop Less than .5V dc For External Device
Input Impedance 2.25 K ohms
Input Current at ON 5mA With 12V dc Input
Leakage Current at OFF Less than 1mA
Response 1-22 msec. Includes Digital Filter Time OFF ® ON, ON ® OFF
Number of Common Points 6 (per 44 inputs) Internally connected to Power Supply
Fuse 3A Protects 12V Power Supply
Isolation Non-Isolated type
Connection 60 Pin flat cable connector (CN51) Max. Length 1m
9A.4.1.1
MTB I/O Module
Specifications