SRSE-2NO SAFETY RELAY MODULE
4
INDUSTRIAL/SRSE-2NO SAFETY RELAY MODULE
Use in manual mode (start/restart interlock activated) is mandatory in case the safety device controls an
access protecting a danger zone and once a person has passed through the opening, he/she may remain
in the danger zone without being detected. Failure to comply with this rule may result in very serious risks
for the persons exposed.
When the K1-1 and K2-1 N.C. control contacts are not used (or no control is provided) it is mandatory to
connect the terminal 11 (K1 K2 FBK) to terminal 12 (SYS STATUS).
MANUAL MODE
With
manual mode
, the outputs of the safety relay are activated only if the safety relay inputs (terminals 7, 8)
are both active and after sending the RESTART signal to the relay using the push-button or by means of a
specific command on the RESTART input (terminal 4)
(please refer to “
” section).
The RESTART command is active with a voltage of 24VDC.
If the RESTART signal is permanently connected to 24VDC the safety module relay works in automatic
restart mode.
* When pin 4 is permanently connected to 24VDC the module works in automatic restart mode
Figure 2 – Manual operation with K1 K2 relays
SIMULTANEITY CHECK
The SRSE-2NO safety relay module is able to monitor two inputs coming from a safety gate, safety guard or
similar (two channels electromechanical safety switch).
Short circuit between the two channels or between the channels and 24VDC are detected by means of the
OUT TEST1, OUT TEST2 signals generated by the safety relay.
Between the two channels a simultaneity check is performed (within 1 sec).
If the simultaneity is not respected, the system remains in OFF with an alternate flashing of the LEDs
IN1 - IN2/FAIL. To reactivate the outputs, it is necessary to open again and close INPUT1 and INPUT2
(respecting the simultaneity).
