Pilz PST 4 - Unit Features; Safety Features; Block Diagram;Terminal Configuration; Types: AC

PST 4
Operating Manual PST 4
18436-EN-06
7
Unit features
} Positive-guided relay outputs:
– 6 safety contacts (N/O), instantaneous
– 4 auxiliary contacts (N/C), instantaneous
} Connection options for:
– Safety gate limit switches
– Start button
} LED indicator for:
– Supply voltage
– Input state channel 1/2
– Output state channel 1/2
} See order reference for unit types
Safety features
The safety relay meets the following safety requirements:
} The circuit is redundant with built-in self-monitoring.
} The safety function remains effective in the case of a component failure.
} The correct opening and closing of the safety function relays is tested automatically in
each on-off cycle.
Block diagram/terminal configuration
Types: AC
} U
B
: 24 VAC; Order no. 720301
} U
B
: 110 VAC; Order no. 720308
} U
B
: 230 VAC; Order no. 720309
PST 4
S11 S12 S13 S24 S33 S34 Y1 Y2
A1 13 23 33 43 53 63 71 81 91 01
CH.1 IN
POWER
CH.2 IN
CH.1 OUT
CH.2 OUT
14 24 34 44 54 64 72 82 92 02 A2
S23 S24S12S11
S33 S34Y2Y1
13 23 33 43
14 24 34 44
53 63
54 64
71
72
81
82
91
92
01
02
~
*Insulation between the non-marked area and the relay contacts: Basic insulation (over-
voltage category III), Protective separation (overvoltage category II)