Data Sheet
72 Series -
Monitoring relays
Technical data
4
*There is no electrical isolation between electrodes and supply voltage for the 24 V DC types (72.x1.9.024.0000). Therefore, for SELV
applications it would be necessary to use a SELV (non-grounded) power supply. In the case of a PELV (grounded) power supply take care to
protect the level control relay against harmful circulating currents by ensuring that no electrodes are grounded.
However, there is no such problem for the 24 V AC types (72.x1.8.024.0000) which, by virtue of an internal isolating transformer, assure
reinforced isolation between electrodes and supply.
Insulation 72.01/72.11 72.42
Insulation Dielectric strength Impulse (1.2/50 μs)
between supply and contacts 4,000 V AC 6 kV 6 kV
between supply and control (for 110…240 V version only) 2,500 V AC — 4 kV
between electrodes, Z1-Z2 and supply* 4,000 V AC 6 kV —
between contacts and electrodes 4,000 V AC 6 kV —
between open contacts 1,000 V AC 1.5 kV 1.5 kV
EMC specifications
Type of test Reference standard 72.01/72.11 72.42
Electrostatic discharge contact discharge EN 61000-4-2 4 kV 4 kV
air discharge EN 61000-4-2 8 kV 8 kV
Radio-frequency electromagnetic field (80...1,000 MHz) EN 61000-4-3 10 V/m 10 V/m
(1…2.8 GHz) EN 61000-4-3 — 5 V/m
Fast transients on supply terminals EN 61000-4-4 4 kV 4 kV
(burst 5/50 ns, 5 and 100 kHz) on control terminals EN 61000-4-4 — 4 kV
Voltage pulses on supply terminals common mode EN 61000-4-5 4 kV 4 kV
(surge 1.2/50 μs) differential mode EN 61000-4-5 4 kV 4 kV
Radiofrequency common mode on supply terminals EN 61000-4-6 10 V 10 V (0.15...230 MHz)
voltage (0.15…280 MHz) on control terminals EN 61000-4-6 — 10 V
Voltage dips 70 % U
N
EN 61000-4-11 — 25 cycles
Short interruptions EN 61000-4-11 — 1 cycles
Radiofrequency conducted emissions (0.15…30 MHz) CISPR 11 class B class B
Radiated emissions (30…1,000 MHz) CISPR 11 class B class B
Terminals
Screw torque Nm 0.8
Wire strip length mm 9
Max. wire size solid cable stranded cable
mm
2
1x6 / 2x4 1x4 / 2x2.5
AWG 1x10 / 2x12 1x12 / 2x14
Other data
Current absorption on Z1 and Z2 (type 72.11) mA < 1
Current absorption on control signal (B1-B3 and B2-B3) 5 mA, 5 V
Power lost to the environment 72.01/72.11 72.42
without contact current W 1.5 0.9 (1 relay ON)
with rated current W 3.2 3.0 (2 relays ON)
Max cable length between electrode and relay (types 72.01/72.11) m 200 (max. capacitance of 100 nF/km)
IX-2012, www.findernet.com