Specifications are subject to change without notice (14.03.01) 1
Timers
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.
Time ranges 3 m - 60 m
8 m - 180 m
0.5 h - 10 h
3 h - 60 h
8 h - 180 h
Time range accuracy 0 to +10% on max.
min. actual time ≤min.
set time
Repeatability deviation ≤1%
Time variation
Within rated power supply ≤0.05%/V
and ambient temperature ≤0.2%/°C
Output SPDT relay
Basic electrical insulation 250 VAC (rms)
(contact/electronics)
Contact ratings (AgCdO) µ (micro gap)
Resistive loads AC 1 8 A/250 VAC (2000 VA)
DC 1 0.4 A/250 VDC (100 W)
or 4 A/25 VDC (100 W)
Small inductive loads AC 15 2.5 A/230 VAC
DC 13 5 A/24 VDC
Mechanical life ≥30 x 10
6
operations
Electrical life AC 1 ≥2.5 x 10
5
operations
(at max. load)
Operating frequency ≤7200 operations/h
Insulation voltages
Rated insulation voltage ≥2.0 kVAC (rms) (cont./elec.)
Rated transient protection volt. 4 kV (1.2/50 µs) (cont./elec.)
(IEC 664)
Plug Output Time ranges Supply: 24 VAC Supply: 115 VAC Supply: 230 VAC Supply: 24 VDC
Circular SPDT 3 m - 60 m SB 135 024 60M SB 135 115 60M SB 135 230 60M SB 135 724 60M
8 m - 180 m SB 135 024 180M SB 135 115 180M SB 135 230 180M SB 135 724 180M
0.5 h - 10 h SB 135 024 10H SB 135 115 10H SB 135 230 10H SB 135 724 10H
3 h - 60 h SB 135 024 60H SB 135 115 60H SB 135 230 60H SB 135 724 60H
8 h - 180 h SB 135 024 180H SB 135 115 180H SB 135 230 180H SB 135 724 180H
Housing
Function
Output
Type
Power supply
Time range
• 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
Delay on Release
Type SB 135
Product Description Ordering Key
Type Selection
Time Specifications Output Specifications
SB 135 024 3S
2Specifications are subject to change without notice (14.03.01)
Power supply AC types Installation cat. III (IEC 664)
Rated operational voltage
through pins 2 & 10 230 230 VAC ± 15%, 45 to 65 Hz
115 115 VAC ± 15%, 45 to 65 Hz
024 24 VAC ± 15%, 45 to 65 Hz
Drop-out tolerance ≥40 ms
Rated insulation voltage ≥2.0 kVAC (rms)
(supply/elec.)
Rated transient protection volt. 4 kV (1.2/50 µs)
(line/neutral)
Power supply DC type Installation cat. III (IEC 664)
Rated operational voltage 724 24 VDC ± 15% (pin 2 pos.)
Rated insulation voltage None
Rated transient protection volt. 800 V (1.2/50 µs)
Consumption AC supply 2.5 VA
DC supply 1.5 W
Built-in battery for
time function
Nominal voltage 5 V
Capacity 40 mAh
Charging current 360 µA
Discharging current 120 µA
SB 135
Time setting
Knob-adjustable on scale in
seconds, minutes or hours.
PE = pin 7
Power supply
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
DMB01, operated by means
of an external contact func-
tion, 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.
Between pins 6 and 7. Pin 6
positive.
Rj= 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.
PowerON delay ≤200 ms
Indication for
Power supply ON LED, red
Environment
Degree of protection IP 20 B
Pollution degree 2 (IEC 664)
Operating -20°to +50°C (-4°to +122°F)
Storage -50°to +85°C (-58°to +185°F)
Weight AC types 200 g
DC types 125 g
Approvals UL, CSA
CE Marking Yes
Battery
control
Supply Specifications General Specifications
Time Setting
Mode of Operation
Battery Control
Wiring Diagram
Specifications are subject to change without notice (14.03.01) 3
SB 135
Power supply
Relay on
Charging of battery
Discharging of battery
Operation Diagram
