Reset Input (Di2); Output; Allowed Sensor Types On Digital Inputs; Reset - Danfoss VLT Safety Option MCB 150 Installation Manual

Installation Guide | VLT® Safety Option MCB 150/151

3.6.2 Reset Input (DI2)

The reset input is for resetting the safety circuit selected on DI1. Configure the reset input for automatic or manual reset types. If
manual reset is configured, wire the DI2A reset input terminal to a 24 V DC via an NO switch.

3.6.3 Output

Safe, single-pole output
S37 is the output that goes to the STO input of the drive.
• STO Acknowledge
- Internal fault on drive or safety option.
- Limit values exceeded.
- Activated via SS1.
- PUST (Power-up Self-Test).
- External failure.

3.6.4 Allowed Sensor Types on Digital Inputs

The following sensor types are applicable:
• Sensors with 2 NC switches.
• Antivalent switches (1 NO switch and 1 NC switch).
• Sensor output of type 2xPNP.
Sensors with 2 NO switches are not applicable.
The safe digital inputs are configured for both directly connecting safety sensors, for example emergency stop control devices or light
curtains, and for connecting preprocessing safety relays, for example, safe controls. See examples of connecting the safe digital input,
in accordance with EN ISO 13849-1 and EN IEC 62061 in

3.6.5 Reset

Both safety inputs must be off after an input fault or PUST has occurred, before a reset is accepted to branch into safe
monitoring again. This reset must only be possible at the location where the safety command has been initiated.
To operate the safety option, the application must send a reset signal either via the LCP, via a dedicated digital input or via a control
word. When a safety function has been activated, or an external failure has caused a failure state, a reset is necessary to enable the
safety option again. When the connected sensor on DI1 or DI2, or both, is enabled via a reset, the safety option can be switched on
again. This deactivates active safety functions or errors.
First, trip alarms shown on the drive must be acknowledged after which a pending safety function can be acknowledged. A
single reset for the alarm mode and a 2
must be reset before an alarm can be reset on the safety option.
32 | Danfoss A/S © 2018.09
4.3.1 Connecting Safe Digital
N O T I C E
N O T I C E
nd
reset for acknowledgment of the active safety function. Alarms caused by the drive
Functions and Systems Overview
Inputs.
AQ279747441421en-000101 / 130R0292