
A.10 I/Os 
The Tuba has:  10 Digital Inputs  6 Digital Outputs  2 Analog Inputs 
A.10.1  Digital Input Interfaces (on GENERAL I/O port) 
Feature Details  Connector Location 
Type of input   Optically isolated 
 Single ended 
 PLC level 
Input current 
Ω
−
=2500
5.6 VVin
Iin   
* Iin = 2.2 mA @ Vin = 12 V 
Input current 
for high speed 
inputs 5 & 6 
Ω
−
=1250
5.6 VVin
Iin  
* Iin = 4.4 mA @ Vin = 12 V 
High-level 
input voltage  12 V < Vin < 30 V, 24 V typical 
Low-level 
input voltage   0 V < Vin < 6.5 V 
Minimum 
pulse width   > 4 x TS, where TS is sampling time 
Execution time 
(all inputs): 
the time from 
application of 
voltage on 
input until 
execution is 
complete 
If input is set to one of the built-in functions — 
Home, Inhibit, Hard Stop, Soft Stop, Hard and Soft 
Stop, Forward Limit, Reverse Limit or Begin — 
execution is immediate upon detection:  
                0 < T < 4 x TS 
If input is set to General input, execution depends 
on program. Typical execution time: ≅ 0.5 msec. 
High-speed 
inputs 5 & 6 - 
minimum pulse 
width, in high-
speed mode 
T < 5 µsec 
Notes: 
 Home mode is high-speed mode and can be 
used for fast capture and precise homing. 
 High speed input has a digital filter set to 
same value as digital filter (EF) of main 
encoder. 
 Highest speed is achieved when turning on 
optocouplers. 
2.5K
Input Return (i)
DIGINPUT
Digital Input Schematic 
DIGITAL INPUTS
Tuba Installation Guide Technical Specifications 
MAN-TUBIG (Ver. 1.3) 
A-13