20.21 20.22, 24, 26, 28 20.23
Features
1 or 2 Pole 16 A Step relays for direct 35 mm
rail (EN 60715) mounting
•17.4 mm wide
•Test button with mechanical indicators
•Choice of 6 switching sequences
•AC coils and DC coils
•Identification label
•Possible to connect illuminated push
buttons with the additional part 026.00
•35 mm rail (EN 60715) mount
•Cadmium free contact material
1 NO (SPST-NO) 2 NO (DPST-NO)
1NO+1NC (SPST-NO+SPST-NC)
16/30 16/30 16/30
250/400 250/400 250/400
4,000 4,000 4,000
750 750 750
2,000 2,000 2,000
750 750 750
1,000 1,000 1,000
2,000 2,000 2,000
1,000 (10/10) 1,000 (10/10) 1,000 (10/10)
AgNi AgNi AgNi
8 - 12 - 24 - 48 - 110 - 120 - 230 - 240
12 - 24 - 48 - 110 12 - 24 - 48 - 110 12 - 24 - 48 - 110
6.5/5 6.5/5 6.5/5
(0.85…1.1)UN (50 Hz)/(0.9…1.1)UN (60 Hz)
(0.9…1.1)UN(0.9…1.1)UN(0.9…1.1)UN
300 · 103300 · 103300 · 103
100 · 103100 · 103100 · 103
0.1s/1h (according to EN 60669) 0.1s/1h (according to EN 60669) 0.1s/1h (according to EN 60669)
444
–40…+40 –40…+40 –40…+40
IP 20 IP 20 IP 20
•Single phase switch 1 NO
(SPST-NO)
•35 mm rail (EN 60715) mount
•Double phase switch
•35 mm rail (EN 60715) mount
•Double phase switch
1NO+1NC (SPST-NO+SPST-NC)
•35 mm rail (EN 60715) mount
Contact specification
Contact configuration
Rated current/Maximum peak current A
Rated voltage/Maximum switching voltage V AC
Rated load AC1 VA
Rated load AC15 (230 V AC) VA
Nominal lamp rating:incandescent (230 V) W
compensated fluorescent (230 V) W
uncompensated fluorescent (230 V) W
halogen (230 V) W
Minimum switching load mW (V/mA)
Standard contact material
Coil specification
Nominal voltage (UN) V AC (50/60 Hz)
V DC
Rated power AC/DC VA (50 Hz)/W
Operating range AC
DC
Technical data
Mechanical life AC/DC cycles
Electrical life at rated load in AC1 cycles
Minimum/Maximum impulse duration
Insulation between coil and contacts (1.2/50 µs)
kV
Ambient temperature range °C
Protection category
Approvals (according to type)
1
FOR UL HORSEPOWER AND PILOT DUTY RATINGS
SEE “General technical information” page V
20 Series - Modular step relays 16 A
Example: 20 series relay, 35 mm rail (EN 60715) mount, double phase switch, 2 NO (DPST-NO) 16 A contacts, coil rated at 12 V DC,
AgSnO2contacts.
2
Ordering information
Type Number
of steps Sequence
Coil specifications
Nominal Coil code Operating range Resistance
Consumption
voltage
Iat UN
UNUmin Umax R
(50 Hz)
VVVΩmA
88.008 6.8 8.8 4 800
12 8.012 10.2 13.2 7.5 550
24 8.024 20.4 26.4 27 275
48 8.048 40.8 52.8 106 150
110 8.110 93.5 121 590 64
120 8.120 102 132 680 54
230 8.230 196 253 2,500 28
240 8.240 204 264 2,700 27.5
AC version data
Contact material
0 = AgNi standard
4 = AgSnO2
Coil voltage
See coil specifications
Coil version
8 = AC (50/60 Hz)
9 = DC
Series
Type
2 = 35 mm rail (EN 60715) mount
No. of poles
1 = Single phase switch 1 NO (SPST-NO)
2 = Double phase switch 2 NO (DPST-NO)
3 = Double phase switch 1 NC+1 NO (SPST-NO+SPST-NC)
4 = 4 sequence double phase switch 2 NO (DPST-NO)
6 = 3 sequence double phase switch 2 NO (DPST-NO)
8 = 4 sequence double phase switch 2 NO (DPST-NO)
2 2 4 09 0 0
... .
01220
20 Series - Modular step relays 16 A
Nominal Coil code Operating range Resistance
Consumption
voltage
Iat UN
UNUmin Umax R
VVVΩmA
12 9.012 10.8 13.2 27 440
24 9.024 21.6 26.4 105 230
48 9.048 43.2 52.8 440 110
110 9.110 99 121 2,330 47
DC version data
If the coil is operated for a prolonged period of time, adequate ventilation of the relays must be provided - suggested gap of 9 mm between
adjacent relays.
Technical data
Insulation
Dielectric strength
between supply and contacts V AC 3,500
between open contacts V AC 2,000
between adjacent contacts V AC 2,000
Other data
Power lost to the environment
with rated current and coil deenergised W 1.3 (20.21, 20.23, 20.28) 2.6 (20.22, 20.24, 20.26)
Screw torque Nm 0.8 0.8
Coil terminals Contact terminals
Max. wire size solid cable stranded cable solid cable stranded cable
mm21x4 / 2x2.5 1x2.5 / 2x2.5 1x6 / 2x4 1x4 / 2x2.5
AWG 1x12 / 2x14 1x14 / 2x14 1x10 / 2x12 1x12 / 2x14
3
Accessories
Example of wiring diagram of type 026.00
This module is necessary when using between 1 and a maximum of 15
illuminated push buttons in the coil circuit (Each 1.5 mA max, 230 V AC).
It must be connected in parallel to the coil of the relay.
Type 026.00
Sealed construction, 7.5 cm insulated flexible wire termination.
Module for use with illuminated push-buttons
Wiring diagrams
N
L
20 Series - Modular step relays 16 A
N
L
Example: 230 V AC supply voltage. Example: 24 V AC supply voltage.
Sheet of marker tags, plastic, 24 tags, 9x17 mm 020.24
Adaptor for panel mounting, 17.5 mm wide 020.01
020.24
020.01
