Functions - WEG CPW22 User Manual

General Information
NOTE!
Depending on the application and configuration some features can be not reached.

2.2 FUNCTIONS

The CPW22 is powered (A1 / A2) with extra-low voltage (SELV / PELV). The internal logical system closes the safety
contacts when the monitored safety inputs is closed and start button (S21) is pressed.
When the monitored safety inputs is opened (S12 / S13 / S14), the output contacts (13-14 / 23-24 / 33-34), forced
guided, are opened and safely shutdown the machine. It is ensured that a single fault does not lead to the loss
of the safety function and that every fault is detected by self-monitoring in a cyclical manner, ensuring detection
after re-energization.
S21
START
POWER
+
A1 A2
SINGLE-CHANNEL SAFETY CIRCUIT
„
A single positively driven contact in the safety component is connected to the relay. This type of connection is
suitable for categories 1 or 2 according EN ISO 13849-1.
DUAL-CHANNEL SAFETY CIRCUIT
„
Two contacts of which at least one is a positively driven contact are connected to the relay. This type of connection
is suitable for categories 3 or 4 according EN ISO 13849-1.
RELAY START CONTROL
„
After the relay has switched off, the relay must be re-started, with manual or automatic start:
Manual start: The relay is started by actuating a button. Before the safety inputs must be re-established.
„
Automatic start: The relay switches on automatically as soon as the safety inputs changes back to the safe
„
state.
ATTENTION!
The renewed starting of the machine can only occurs automatically if it is ensured that there can be
no dangerous state.
6 | CPW22
S10 S11 S12 S13
+
LOGIC
-
-
Figure 2.1: Block diagram
S14 13 23 33
K1
K2
14 24 34
41
42