Timers
Delay on Release
Type SB 135
• Time ranges: 0.15 s to 180 h
• Automatic start after drop-out of power supply
• Knob-adjustable time within range
• Oscillator-controlled time circuit
• Repeatability deviation:
≤
1%
• Output: 8 A SPDT relay
• Plug-in type module
• S-housing
• LED-indication for power supply on
• AC or DC power supply
Product Description
Mono-function, plug-in delay
on release time relays up to
180 h covering 10 individual
time ranges. Often used for
monitoring an external power
supply and signalling drop-
out of power supply after a
preset period of time.
Ordering Key
Housing
Function
Output
Type
Power supply
Time range
SB 135 024 3S
Type Selection
Plug
Circular
Output
SPDT
Time ranges
0.15 s
0.8 s
3s
8s
0.5 m
3m
8m
0.5 h
3h
8h
- 3s
- 18 s
- 60 s
- 180 s
- 10 m
- 60 m
- 180 m
- 10 h
- 60 h
- 180 h
Supply: 24 VAC
SB 135 024 3S
SB 135 024 18S
SB 135 024 60S
SB 135 024 180S
SB 135 024 10M
SB 135 024 60M
SB 135 024 180M
SB 135 024 10H
SB 135 024 60H
SB 135 024 180H
Supply: 115 VAC
SB 135 115 3S
SB 135 115 18S
SB 135 115 60S
SB 135 115 180S
SB 135 115 10M
SB 135 115 60M
SB 135 115 180M
SB 135 115 10H
SB 135 115 60H
SB 135 115 180H
Supply: 230 VAC
SB 135 230 3S
SB 135 230 18S
SB 135 230 60S
SB 135 230 180S
SB 135 230 10M
SB 135 230 60M
SB 135 230 180M
SB 135 230 10H
SB 135 230 60H
SB 135 230 180H
Supply: 24 VDC
SB 135 724 3S
SB 135 724 18S
SB 135 724 60S
SB 135 724 180S
SB 135 724 10M
SB 135 724 60M
SB 135 724 180M
SB 135 724 10H
SB 135 724 60H
SB 135 724 180H
Time Specifications
Time ranges
0.15 s - 3 s
0.8 s - 18 s
3s
- 60 s
8s
- 180 s
0.5 m - 10 m
3 m - 60 m
8 m - 180 m
0.5 h - 10 h
3h
- 60 h
8h
- 180 h
0 to +10% on max.
min. actual time
≤
min.
set time
≤
1%
≤
0.05%/V
≤
0.2%/°C
Output Specifications
Output
Basic electrical insulation
Contact ratings
(AgCdO)
Resistive loads
AC 1
DC 1
or
Small inductive loads AC 15
DC 13
Mechanical life
Electrical life
AC 1
Operating frequency
Insulation voltages
Rated insulation voltage
Rated transient protection volt.
SPDT relay
250 VAC (rms)
(contact/electronics)
µ (micro gap)
8 A/250 VAC (2000 VA)
0.4 A/250 VDC (100 W)
4 A/25 VDC (100 W)
2.5 A/230 VAC
5 A/24 VDC
≥
30 x 10
6
operations
≥
2.5 x 10
5
operations
(at max. load)
≤
7200 operations/h
≥
2.0 kVAC (rms) (cont./elec.)
4 kV (1.2/50 µs) (cont./elec.)
(IEC 664)
Time range accuracy
Repeatability deviation
Time variation
Within rated power supply
and ambient temperature
Specifications are subject to change without notice (25.10.99)
1
SB 135
Supply Specifications
Power supply AC types
Rated operational voltage
through pins 2 & 10
230
115
024
Drop-out tolerance
Rated insulation voltage
Rated transient protection volt.
Power supply DC type
Rated operational voltage 724
Rated insulation voltage
Rated transient protection volt.
Consumption
AC supply
DC supply
Built-in battery for
time function
Nominal voltage
Capacity
Charging current
Discharging current
Installation cat. III (IEC 664)
230 VAC ± 15%, 45 to 65 Hz
115 VAC ± 15%, 45 to 65 Hz
24 VAC ± 15%, 45 to 65 Hz
≥
40 ms
≥
2.0 kVAC (rms)
(supply/elec.)
4 kV (1.2/50 µs)
(line/neutral)
Installation cat. III (IEC 664)
24 VDC ± 15% (pin 2 pos.)
None
800 V (1.2/50 µs)
2.5 VA
1.5 W
General Specifications
PowerON delay
Indication for
Power supply ON
Environment
Degree of protection
Pollution degree
Operating
Storage
Weight
AC types
DC types
Approvals
≤
200 ms
LED, red
IP 20 B
2 (IEC 664)
-20° to +50°C (-4° to +122°F)
-50° to +85°C (-58° to +185°F)
200 g
125 g
UL, CSA
Time Setting
Time setting
Knob-adjustable on scale in
seconds, minutes or hours.
5V
40 mAh
360 µA
120 µA
Mode of Operation
The relay operates immedi-
ately after power supply is
applied.
When power supply is inter-
rupted, the time period starts
and at expiration of the set
time period, the relay releases.
If power supply is reapplied
before the relay is released,
the time is reset and the re-
lay remains on.
The built-in battery is re-
charged when power supply
is applied and is discharged
during the time periods.
To maintain sufficient energy
in the battery, the relay must
be recharged for at least one
third of the total discharging
periods as the recharge/dis-
charge current ratio is 3:1.
The capacity of the built-in
battery is sufficient for more
than 300 h of continuous time
measuring without recharg-
ing it.
Please note
The SB 135 should not be
operated by short pulses. For
this purpose the relay S 1221,
operated by means of an ex-
ternal
contact
function,
should be used.
NB!
It is recommended to
connect the SB 135 to the
power supply for 48 hrs be-
fore it is put into regular ser-
vice in order to compensate
for energy losses due to e.g.
a long storage period.
Wiring Diagram
Battery
control
PE = pin 7
Power supply
Battery Control
Between pins 6 and 7. Pin 6
positive.
R
j
= 1 kΩ.
Curve I
Ideal battery voltage at unin-
terrupted power supply.
Curve II
Min. battery voltage. Battery
should be recharged before
voltage drops to min. level.
Curve III
Course of battery voltage.
The recharging periods must
always equal at least one
third of the total discharging
periods.
2
Specifications are subject to change without notice (25.10.99)
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