3
AZS 2305
Operating instructions
Fail-safe delay timer
EN
3. Mounting
3.1 General mounting instructions
Mounting: snaps onto standard DIN rails to EN 60715.
3.2 Dimensions
All measurements in mm.
11
0
60
62
.5
75
55
37.5
4.5
A2 S13
S1
S14 S21 S22 14
24
34
Made in Germany
Wuppertal
Funktion
A1
Y2
Y1
33
23
13
4. Rear side Electrical connection
4.1 General information for electrical connection
The electrical connection may only be carried out by
authorised personnel in a de-energised condition.
Wiring examples: see appendix.
5. Operating principle and settings
5.1 Operating principle after the operating voltage is switched on
1. The functioning of the fail-safe delay timer is checked.
2. An initialisation stage is started during the parity check of the set
time values. In case of varying time values, the red LED is on. The
initialisation stage of the fail-safe delay timer is maintained until both
times are matching due to modification of the switches positions.
3. The fail-safe delay timer is in starting position, when the NO contact
at S1 (S13/S14) is closed and the NC contact at S1 (S21/S22) is
opened. The relay contacts are open and the time registration is
stopped. In case of a signal change at both inputs, the rating of the set
time is started. The yellow LED is intermittently on. The LED flashes
during these intermissions. The minimum unoccupied cycle time can be
determined by means of the number of these impulses (see Table 2). In
case of an unoccupied cycle time of one minute, the impulse frequency
will increase permanently until the relay contacts are closed after
expiration of this time.
4. The input signal at S1 is continuously monitored. In case of a
change, the relay contacts are opened and the time measurement is
stopped.
Signal input S1
S13/S14: connection NO contact
S21/S22: connection NC contact
Outputs
Enabling paths 13-14/23-24/33-34
NO contacts for safety functions
Additional outputs Y1/Y2
Y1: "Enabling signal"; the enabling paths are closed
Y2: "Error"; if the fail-safe delay timer detects an error, Y2 is switched.
The additional outputs Y1 and Y2 must not be integrated in
the safety circuit.
5.2 Setting of the time "T"
The setting of time "T" is realised by means of rotary and sliding
switches and is only saved after the operating voltage is switched
on. The sliding switches are changing the time factor and the rotary
switches the numerical value. To change the time, the enclosure cover
must be removed. (Caution: please observe the handling prescriptions,
electroshock hazard). The symbols of the rotary and sliding switches
are represented at the rear of the cover. These switches must have
the same setting for channel I and II. By rotating the upper rotary
switch, the unit position and by rotating the lower rotary switch the tens
position of the numerical value is changed. The time "T" is calculated by
multiplying the numerical value and the time factor.
Table 1: Representation of the sliding switch positions and their
assigned time factor
Time range
Sliding switch
Time
factor
Time "T"
1
2
3
4
0.1 … 9.9 s
1
0
1
0
0.1 s Numerical value x 0.1 s
1.0 … 99 s
0
0
0
0
1.0 s Numerical value x 1.0 s
10 … 990 s
0
1
0
1
10 s
Numerical value x 10 s
1.0 … 99 min
1
1
1
1
60 s
Numerical value x 60 s
Determination of the unoccupied cycle time
During the rating of the time "T", the yellow LED flashes with brief
impulses. The residual unoccupied cycle time can be derived from
the number of these impulses. Table 2 represents the remaining
unoccupied cycle time depending on the impulses.
Table 2: Number of impulses depending on the unoccupied cycle
time
Number of
impulses n
1
2
3
4
5
6
Minimum unoccupied
cycle time
T/2
T/4
T/8
T/16
T/32
T/64
