The Safe Disable input provides the stop function that complies with “Safe Torque Off” as specified by IEC/EN 61800-5-2. The Safe Disable input meets the requirements of EN ISO 13849-1 and IEC/EN 61508. It also has a safety status monitor to detect safety circuit errors.

When you install the drive as a component in a system, you must make sure that the system complies with the applicable safety standards.

Refer to Table 1 for safety function specifications.

Table 1. Safe Disable Specifications

Item

Description

Input/Output

  • Input: 2

    Safe Disable input (H1, H2)

    Signal ON level: 18 Vdc to 28 Vdc

    Signal OFF level: -4 Vdc to +4 Vdc

  • Output: 1

    MFDO safety monitor output for external device monitor (EDM)

Response time from when the input opens to when the drive output stops

3 ms or less

Response time from when the H1 and H2 terminal inputs open to when the EDM signal operates

20 ms or less

Failure probability

Less frequent operation request mode

PFD = 4.65E-6

Frequent operation request mode or continuous mode

PFH = 1.11E-9

Performance level

The Safe Disable input complies with the performance level requirements of EN ISO 13849-1.

HFT (hardware fault tolerance)

N = 1

Type of subsystem

Type B
Note:

EDM = External Device Monitoring

PFD = Probability of Failure on Demand

PFH = Probability of Dangerous Failure per Hour