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2   SYSTEM CONFIGURATION 
 
!
 
CAUTION 
 Do not connect the A31TU-D3  to the cable for teaching unit (Q170TUDNCBL03M-A). The protective 
function stops working. 
 Be sure to fix the relay portion of a connector which has connected the cable for teaching unit 
(Q170TUDNCBL03M-A) with teaching unit (A31TU-DN
) so that impossible power is not applied 
for the connector of Motion CPU (Q173CPUN-T/Q172CPUN-T). A connector may be damaged. 
 Do not pull a teaching unit (A31TU-DN ). A connector may be damaged.       
 When a teaching unit (A31TU-DN ) is removed, first be sure to remove a TU connector of Motion 
CPU (Q173CPUN-T/Q172CPUN-T) so that impossible power is not applied for the connector. 
If a connector of teaching unit (A31TU-DN
) is removed connecting a TU connector of Motion 
CPU (Q173CPUN-T/Q172CPUN-T), a TU connector of Motion CPU (Q173CPUN-T/ 
Q172CPUN-T) may be damaged. 
 When the teaching unit (A31TU-DN ) is not used in the Motion CPU (Q173CPUN-T/ 
Q172CPUN-T), connect the short-circuit connector for teaching unit (Q170TUTM) after removing 
a TU connector of cable for teaching unit (Q170TUDNCBL03M-A) from a TU connector of Motion 
CPU (Q173CPUN-T/Q172CPUN-T). If it is not connected, the emergency stop state of Motion 
CPU occurs, and the servomotor becomes coasting state.