Delta EB3000 Series User Manual page 79

Chapter 4 WiringEB3000
4-9-3 Wiring Diagram
4-9-3-1 Internal Safety Circuit
Figure 4-24 shows the drive's internal safety circuit. STO circuit consists of two independent input
channels that can block the output transistors (terminals STO1 and STO2). The input uses the
drive internal power supply (E24V). A photocoupler output is available to monitor the status of STO
terminals SMO+ and SMO-. For details on signal specifications when using this output, see Digital
Output Settings in Parameter Group 01 in Chapter 8 Descriptions of Parameter Settings.
Additionally, a STO monitoring function can be assigned to one of the digital outputs (MO=42 STO
Output Status).
Figure 4-24
4-9-3-2 Internal Safety Circuit Terminals
Group Ⓒ in Figure 4-25 shows the default for terminals E24V-STO1-STO2 and terminals SMO+-
SMO--DCM in the drive's internal safety circuit, which are short-circuited when they are delivered
from the factory.
Figure 4-25
NOTE: Well-insulated wiring according to ISO 13849-2:2012, table D.4 for STO1, STO2, and E24V
shall be adopted.
4-26