Accelnet Plus Micro Modules User Guide
16-01687 Rev 03
Copley Controls
Page 106 of 139
AEV
&
APV
C
ONFIGURATION
[IN1] is shown as the input for the Enable function. The [INCOM] signal for [IN1] connects to
ground.
When +24 Vdc is applied to [IN1] it will enable the AEV & APV if no other inputs are configured
as Enables and no Enable inputs are inactive. If more than one input is configured as Enable,
then all must be active in order to enable the drive. The PNOZ relay uses both contacts of the
delayed relay for two-channel control of the STO function, which is necessary for SIL 3, Cat.
3 PL e.
Example STO Timing
Power
+24 VDC supplied to the safety relay
Reset/Start Momentary push-button that causes the K1~K2 relay contacts to close, supplying power to the STO inputs
of the drive, and de-activating the STO function. This allows the drive to produce torque/force in the
motor when it is enabled.
E-Stop
The latching push-button switch inputs to the safety relay. The HI level of this indicates that the button has
been released, opening the NC (Normally Closed) contacts.
K1, K2
The instantaneous contacts in the relay. A HI level indicates that the contacts are closed, supplying power
to an Enable input of the drive to place it in an enabled state.
K3, K4
Relay contacts that will open after a pre-set time delay. This allows time for the drive
to remain in an enabled state while is performs a controlled deceleration that brings
the motor to a standstill before the STO function is activated,
preventing any torque/force production in the motor.
t1
Switch-on delay. If the E-Stop button is out, this is the delay after the Reset/Start button is pressed in and
the K1~K4 relay contacts close, deactivating the STO function and enabling the drive (1).
t2
Delay-on de-energization. When the E-Stop button is pressed in (E-Stop), this is the delay to the opening
of the K1~K2 contacts which disables the drive, initiating a controlled deceleration of the motor (2).
t3
Waiting period. This is the time-delay that allows for the controlled deceleration of the motor. When the E-
Stop button is pressed in, this is the time delay to the K3~K4 contact opening which will activate the
STO (3).
t4
STO response time. This is the time between the de-energizing of the drive STO inputs
(K3~K4 contacts open) and the entry into the safe-state.