4.5  I/O Signal Connections
4.5.1  I/O Signal Connector (CN1) Names and Functions
4-34
4.5
I/O Signal Connections 
4.5.1
I/O Signal Connector (CN1) Names and Functions
The following table gives the pin numbers, names, and functions the I/O signal pins for the 
default settings.
Input Signals 
Default settings are given in parentheses.
* You can change the allocations. Refer to the following section for details. 
6.1.1 Input Signal Allocations on page 6-4
Note: If forward drive prohibition or reverse drive prohibition is used, the SERVOPACK is stopped by software con-
trols. If the application does not satisfy the safety requirements, add external safety circuits as required. 
Signal  Pin No.  Name  Function  Reference 
/SI1
*
(P-OT)
7
General-purpose 
Sequence Input 1 (For-
ward Drive Prohibit Input)
You can allocate the input signal to use 
with a parameter. 
(Stops Servomotor drive (to prevent over-
travel) when the moving part of the 
machine exceeds the range of move-
ment.)
page 5-28
/SI2
*
(N-OT)
8
General-purpose 
Sequence Input 2 
(Reverse Drive Prohibit 
Input)
/SI3
*
(/DEC)
9
General-purpose 
Sequence Input 3 (Ori-
gin Return Deceleration 
Switch Input)
You can allocate the input signal to use 
with a parameter. 
(Connects the deceleration limit switch for 
origin return.)
−
/SI4
*
(/EXT1)
10
General-purpose 
Sequence Input 4 (Exter-
nal Latch Input 1)
You can allocate the input signals to use 
with parameters. 
(Connect the external signals that latch 
the current feedback pulse counter.)
−
/SI5
*
(/EXT2)
11
General-purpose 
Sequence Input 5 (Exter-
nal Latch Input 2)
/SI6
*
(/EXT3)
12
General-purpose 
Sequence Input 6 (Exter-
nal Latch Input 3)
/SI0
*
13
General-purpose 
Sequence Input 0
You can allocate the input signal to use 
with a parameter. 
(Used for general-purpose input. You can 
monitor this signal in the I/O monitor field 
of MECHATROLINK.)
−
+24VIN
6
Sequence Input Signal 
Power Supply Input
Inputs the sequence input signal power 
supply.
Allowable voltage range: 24 VDC ±20% 
The 24-VDC power supply is not provided 
by Yaskawa.
−
BAT+
14
Battery for Absolute 
Encoder (+)
These are the pins to connect the abso-
lute encoder backup battery. 
Do not connect these pins if you use the 
Encoder Cable with a Battery Case. 
−
BAT-
15
Battery for Absolute 
Encoder (-)
TH 5
Overheat Protection 
Input
Inputs the overheat protection signal from 
a Linear Servomotor or from a sensor 
attached to the machine.
page 6-62