20 Series - Modular step relays 16 A

Features 20.21 20.22, 24, 26, 28 20.23

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 • Single phase switch 1 NO • Double phase switch • Double phase switch
• Cadmium free contact material (SPST-NO) • 35 mm rail (EN 60715) mount 1NO+1NC (SPST-NO+SPST-NC)
• 35 mm rail (EN 60715) mount • 35 mm rail (EN 60715) mount

FOR UL HORSEPOWER AND PILOT DUTY RATINGS

SEE “General technical information” page V
Contact specification
Contact configuration 1 NO (SPST-NO) 2 NO (DPST-NO) 1NO+1NC (SPST-NO+SPST-NC)
Rated current/Maximum peak current A 16/30 16/30 16/30
Rated voltage/Maximum switching voltage V AC 250/400 250/400 250/400
Rated load AC1 VA 4,000 4,000 4,000
Rated load AC15 (230 V AC) VA 750 750 750
Nominal lamp rating:incandescent (230 V) W 2,000 2,000 2,000
compensated fluorescent (230 V) W 750 750 750
uncompensated fluorescent (230 V) W 1,000 1,000 1,000
halogen (230 V) W 2,000 2,000 2,000
Minimum switching load mW (V/mA) 1,000 (10/10) 1,000 (10/10) 1,000 (10/10)
Standard contact material AgNi AgNi AgNi
Coil specification
Nominal voltage (UN) V AC (50/60 Hz) 8 - 12 - 24 - 48 - 110 - 120 - 230 - 240
V DC 12 - 24 - 48 - 110 12 - 24 - 48 - 110 12 - 24 - 48 - 110
Rated power AC/DC VA (50 Hz)/W 6.5/5 6.5/5 6.5/5
Operating range AC (0.85…1.1)UN (50 Hz)/(0.9…1.1)UN (60 Hz)
DC (0.9…1.1)UN (0.9…1.1)UN (0.9…1.1)UN
Technical data
Mechanical life AC/DC cycles 300 · 103 300 · 103 300 · 103
3 3
Electrical life at rated load in AC1 cycles 100 · 10 100 · 10 100 · 103
Minimum/Maximum impulse duration 0.1s/1h (according to EN 60669) 0.1s/1h (according to EN 60669) 0.1s/1h (according to EN 60669)
Insulation between coil and contacts (1.2/50 µs) kV 4 4 4
Ambient temperature range °C –40…+40 –40…+40 –40…+40
Protection category IP 20 IP 20 IP 20
Approvals (according to type)
1
 20 Series - Modular step relays 16 A
Ordering information
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,
AgSnO2 contacts.

2 0 . 2 2 . 9 . 0 1 2 . 4 0 0 0
Series Contact material
Type 0 = AgNi standard
2 = 35 mm rail (EN 60715) mount 4 = AgSnO2

No. of poles Coil voltage

1 = Single phase switch 1 NO (SPST-NO) See coil specifications
2 = Double phase switch 2 NO (DPST-NO)
3 = Double phase switch 1 NC+1 NO (SPST-NO+SPST-NC) Coil version
4 = 4 sequence double phase switch 2 NO (DPST-NO) 8 = AC (50/60 Hz)
6 = 3 sequence double phase switch 2 NO (DPST-NO) 9 = DC
8 = 4 sequence double phase switch 2 NO (DPST-NO)

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
2
mm 1x4 / 2x2.5 1x2.5 / 2x2.5 1x6 / 2x4 1x4 / 2x2.5
AWG 1x12 / 2x14 1x14 / 2x14 1x10 / 2x12 1x12 / 2x14
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.

Coil specifications
DC version data
Nominal Coil code Operating range Resistance Consumption Number Sequence
Type of steps
voltage I at UN
UN Umin Umax R
V V V Ω mA
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

AC version data
Nominal Coil code Operating range Resistance Consumption
voltage I at UN
UN Umin Umax R (50 Hz)
V V V Ω mA
8 8.008 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
2
 20 Series - Modular step relays 16 A
Wiring diagrams

L L

N N

Example: 230 V AC supply voltage. Example: 24 V AC supply voltage.

Accessories
Module for use with illuminated push-buttons

Type 026.00 Example of wiring diagram of type 026.00

Sealed construction, 7.5 cm insulated flexible wire termination. 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.

Adaptor for panel mounting, 17.5 mm wide 020.01

020.01

Sheet of marker tags, plastic, 24 tags, 9x17 mm 020.24

020.24