ETC2 B128724060 Timers delay on release Datasheet

Timers
Delay on Release
Types B 128, B 121
• Time ranges: 0.15 s to 60 s
• Automatic start after drop out of power supply
• Knob-adjustable time within range
• Repeatability deviation: ≤ 1%
• Output: 10 A SPDT relay
• Plug-in type module
• Scantimer housing
• LED-indication for supply on
• AC or DC power supply
Product Description
Ordering Key
Mono-function, plug-in, delay
on release, miniature time relays up to 60 s covering 2
individual time ranges. These
economical timers are often
Function
Output
Type
Power supply
Time range
used to switch on an exhaust
fan and keep it running for a
certain period of time after
disconnection of power supply.
B 128 220 006
Type Selection
Plug
Output
Time ranges
Supply: 24 VAC
Supply: 120 VAC
Supply: 220 VAC
Supply: 24 VDC
Circular
8 pins
SPDT
0.15 - 6 s
1.5 - 60 s
B 128 024 006
B 128 024 060
B 128 120 006
B 128 120 060
B 128 220 006
B 128 220 060
B 128 724 006
B 128 724 060
Circular
11 pins
SPDT
0.15 - 6 s
1.5 - 60 s
B 121 024 006
B 121 024 060
B 121 120 006
B 121 120 060
B 121 220 006
B 121 220 060
B 121 724 006
B 121 724 060
Time Specifications
Time ranges
Time range accuracy
Repeatability deviation
Time variation
Within rated power supply
and ambient temperature
Reset
Time and/or relay
Output Specifications
0.15 6s
1.5 - 60 s
0 to +20% on max.
min. actual time ≤ min.
set time
≤ 1%
≤ 0.05%/V
≤ 0.2%/°C
Power supply interruption
≥ 500 ms
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
SPDT relay
250 VAC (rms)
(contact/electronics)
µ (micro gap)
10 A/250VAC (2500 VA)
1 A/250 VDC (250 W)
10 A/25 VDC (250 W)
2.5 A/230 VAC
5 A/24 VDC
≥ 30 x 106 operations
≥ 2.5 x 105 operations
(at max. load)
≤ 7200 operations/h
Operating frequency
Insulation voltages
Rated insulation voltage
≥ 2.0 kVAC (rms) (cont./elec.)
Rated transient protection volt. 4 kV (1.2/50 µs) (cont./elec.)
(IEC 60664)
Specifications are subject to change without notice (25.10.99)
1
B 128, B 121
Supply Specifications
General Specifications
Power supply AC types
Rated operational voltage
Through pins 2 & 10
220
or pins 2 & 7
120
Power ON time
Indication for
Power supply ON
Environment
Degree of protection
Pollution degree
Operating temperature
Storage temperature
Weight
Approval
Installation cat. III (IEC 60664)
220 VAC ±15%,
45 to 65 Hz
120 VAC ±15%,
45 to 65 Hz
024
24 VAC ±15%,
45 to 65 Hz
Dropout tolerance
≥ 10 ms
Rated insulation voltage
None
Rated transient protection volt. 4 kV (1.2/50 µs) @ 220 VAC
2.5 kV (1.2/50 µs) @ 120 VAC
800 V (1.2/50 µs) @ 24 VAC
(line/neutral)
Power supply DC type
Installation cat. III (IEC 60664)
Rated operational voltage 724 24 VDC + 15/- 20% (pin 2 pos.)
Rated insulation voltage
None
Rated transient protection volt. 800 V (1.2/50 µs)
60 mA @ 50 Hz/70 mA @ 60 Hz
Consumption
AC supply
DC supply
1W
Mode of Operation
The relay operates immediately after power supply is
applied.
When power supply is interrupted, the time period starts
and at the end of the set time
the relay releases.
If power supply is reapplied
before the relay releases, the
time is reset and the relay
remains on.
B 121/B 128 monitor that
power supply is applied. If
power supply is interrupted,
the relay starts e.g. an alarm
(battery driven) after the time
period has expired.
Please note
B 128 and B 121 should not
be operated by pulses shorter
than 500 ms.
≥ 200 ms
LED, red
IP 20 B
2 (IEC 60664)
-20° to +50°C (-4° to +122°F)
-50° to +85°C (-58° to +185°F)
85 g
UL, CSA
Wiring Diagrams
SPDT
8 pin
SPDT
11 pin
Power supply
B 128
Power supply
B 121
Time Setting
Accessories
Knob-adjustable on scale in
seconds.
Sockets◊
Hold down spring◊
Mounting rack
Socket cover
Potentiometer lock
S 408, S 411
HF
SM 13
BB 4
PL 1
For further information refer "Accessories".
Operation Diagram
Power supply
Relay on
2
Specifications are subject to change without notice (25.10.99)
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