Specifications are subject to change without notice (27.10.99) 1
Timers
Two-state, plug-in time relays
with built-in memory and timer
up to 3 s. When interrupting
power supply, the contact
switches after an adjustable
delay to the opposite posi-
tion where it remains. Often
used in applications with two
pumps in order to prevent the
same pump from always start-
ing first.
Time ranges 0.15 - 3 s
Time range accuracy 0 to +20% on max.
min. actual time ≤min.
set time
Repeatability deviation ≤1%
Time variation
Within rated power supply ≤0.2%/°C
and ambient temperature ≤0.05%/V
Reset ≥set delay
SPDT relay
Basic electrical insulation 250 VAC (rms)
(contact/electronics)
Contact ratings (AgCdO) µ (micro gap)
Resistive loads AC 1 10 A/250 VAC (2000 VA)
DC 1 1 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 106operations
Electrical life
AC 1 ≥2.5 x 105operations
(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 60664)
Plug Output Time range Supply: 24 VAC Supply: 115 VAC Supply: 230 VAC Supply: 24 VDC
Circular SPDT 0.15 -3 s SG 125 024 SG 125 115 SG 125 230 SG 125 724
Housing
Function
Output
Type
Power supply
• Two-state relay with built-in memory
• Time ranges: 0.15 s to 3 s
• Switches, with a preset delay, to opposite contact
position at power supply interruption
• Repeatability deviation: ≤1%
• Output: 8 A SPDT relay
• Plug-in type module
• S-housing
• LED-indication for relay on
• AC or DC power supply
Two-state Relay
Type SG 125
SG 125 024
Ordering Key
Product Description
Type Selection
Time Specifications Output Specifications
2Specifications are subject to change without notice (27.10.99)
SG 125
Mode of Operation
The relay contact remains in
its present position (pins 1
and 4 or pins 1 and 3) when
power supply is applied.
When interrupting power sup-
ply, however, after a delay of
0.15 - 3 s set on the poten-
tiometer the contact switch-
es to the opposite position
where it remains.
Power supply
Relay ON, pins 1 & 3
Relay ON, pins 1 & 4
Power ON time ≥1 s
Power OFF delay ≥set delay
Indication for
Output ON LED. red
Environment
Degree of protection IP 20 B
Pollution degree 2 (IEC 60664)
Operating temperature -20° to +50°C (-4° to +122°F)
Storage temperature -50° to +85°C (-58° to +185°F)
Weight AC types 200 g
DC types 125 g
Approvals UL, CSA
Power supply AC types Installation cat. III (IEC 60664)
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 60664)
Rated operational volt. 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
Socket◊S 411
Hold down spring◊HF
Mounting rack SM 13
Socket cover BB 4
Front mounting bezel FRS2
Potentiometer lock PL
For further information refer to "Accessories".
For other AC/DC voltages refer to "General Information".
Power supply
0.15 - 3 s.
Knob-adjustable on relative
scale.
Supply Specifications General Specifications
Wiring Diagram
Accessories
Operation Diagram
Time Setting
