3.2 Function Block Diagram
The following diagram shows function blocks and a typical wiring example.
L1
L2
L3
L1C
L2C
STO
Circuit
Control
Circuit
U
V
W
M
Encoder
Brake
ALPHA7
WSU-ST1
Servo motor
SIA1+
SIA1-
SIA2+
SIA2-
RES+
RES-
Safety
Control
circuit
電源
SIB1+
SIB1-
SIB2+
SIB2-
PISBC1
SBC1
PISBC2
SBC2
PI_SSM1
SSM1
CM_SSM1
PI_SSM2
SSM2
CM_SSM2
EDM1+
EDM1-
EDM2+
EDM2-
*1
*1
*1
*1
*1
*1
*1
*3
*2
*3
*4
*4
*4
*4
*4
*4
(*1) An external 24 VDC ±10% power supply (SELV) is required for the interface. For convenience' sake, the power supply has been
separated, however, configuration with a common power supply is possible.
(*2) Use safety components such as safety relays or safety switches compatible with EN ISO13849-1 standard PL-d or higher, or EN /IEC
61508 standard SIL2 or higher.
(*3) Use safety relays compatible with EN ISO13849-1 standard PL-d or higher, or EN /IEC 61508 standard SIL2 or higher. Use a 24 VDC
excitation voltage, contact a for main contacts, and contact b for auxiliary contacts.
(*4) There is a possibility that internal switching components may be damaged by relay surge voltage that occurs when the product is OFF. In
order to suppress surge voltage, connect diodes or varistors, etc. near relays. Internal circuits will be damaged if the diode polarity is
mistaken.
3.3 External Dimensions and Name of Each Part