14-6
182582-1CD
182582-1CD
14 Description of Units and Circuit Boards
14.2Axes Control Circuit Board
MH900, DX200 Controller
14.2.2  External Axes Control Circuit Board (SRDA-EAXB21A) 
An external axes control circuit board (SRDA-EAXB21A) is used to control 
the S, L, and U axes servomotors of the MH900 robot. It is mounted on the 
major axes control circuit board
Fig. 14-3: External Axes Control Circuit Board (SRDA-EAXB21A)
(CN524)
(CN523)
(CN522)
(CN533)
CN531(Lower)
CN532(Upper)
(CN536)
(CN535)
(CN534)
PWM amplifier 9 I/F
PWM amplifier 7 I/F
PWM amplifier 8 I/F
 (CN542) Encorder distribution for 
 the machine safety system (U axis) 
 (CN541) Encorder distribution for 
 the machine safety system (L axis) 
 (CN540) Encorder distribution for 
 the machine safety system (S axis) 
STO control signal I/F 
STO control signal I/F 
STO control signal I/F 
Encoder I/F (U axis)
Encoder I/F (L
 axis)
Encoder I/F (S axis)