Signals; Inputs; Restart_Fbk; Digital Inputs - Reer MZERO Installation, Use And Maintenance Manual

SIGNALS

INPUTS

RESTART_FBK

The four RESTART_FBK (EN 61131-2, Type 2) signal inputs allow MZERO to verify an EDM (External
Device Monitoring) feedback signal (series of contacts) from the external contactors and to
monitor Manual/Automatic operation (RESTART function). (See the list of possible connections in
Table 3).

If the application requires it, the response time of the external contactors must be verified
by an additional device.

The RESTART command must be installed outside the danger area in a position where the
danger area and the entire work area concerned are clearly visible.

It must not be possible to reach the control from inside the danger area.
MODE OF
OPERATION
AUTOMATIC
K1_K2 control
MANUAL
K1_K2 control
➔
RESTART_FBK inputs can also be used as Digital INPUTS (del manuale istruzioni scaricabile
dal sito web ReeR) when not used in Restart_Fbk mode.

Digital INPUTS

• MZERO provides 16 high active PNP digital inputs (terminals 25...40) that allow
connection to project hardware components. These inputs are designed according to
EN 61131-2 Type 3.
• In addition to the 16 digital inputs, MZERO can also use the 4 RESTART_FBK inputs
(terminals 7, 11, 15, 19) as individual digital inputs. These inputs do not have all the
possible configurations of the 16 digital inputs and can only use the RESTART INPUT
function block (see RESTART INPUT section on page 59).
8541403 • 19/07/2021 • Rev.1
STAND ALONE PROGRAMMABLE SAFETY CONTROLLER
EDM
With K1_K2
control
Without
With K1_K2
control
Without
RESTART_FBK
Table 3
15