1 5 Digital output EL2602 Digital output | Relay outputs up to 230 V AC EtherCAT Terminal 134 The EtherCAT Terminals switch a relay as a function of a bit in the process image. The relays completely isolate the current flow by a mechanical contact; there is no residual current through the open contact. The EtherCAT Terminals are not equipped with a protective circuit, so as not to allow for residual current by parallel switched components. The relay contacts differ in their contact material. Signal contacts also switch small voltages and currents; large current leads to a change in the contact characteristics. Power contacts can also switch large loads. However, an oxide layer on the power contacts prevents safe contact for small voltages below 1 V DC. The contacts of the small-signal relays in the EL2612 and EL2614 are specially coated, so that they can switch small loads reliably. Should this coating become damaged through overload caused by high switching currents, only larger loads can be handled thereafter. Switching on is accompanied by a bouncing: the electrical connection is initially switched on and off briefly, until the contact is securely in its closed location. With an inductive load (coil) this behaviour leads to a spark and to corresponding electromagnetic radiation. Capacitive loads create a short-circuit for a brief period of time. This can – particularly with alternating voltages – lead to such high switch-on currents at switch-on under peak value that the bouncing contact is burned shut. A capacitive load can also be electronic devices, which are typically equipped with a rectifier in the input and a relatively large smoothing capacitor. Electronic ballast is especially critical for fluorescent lamps. The maximum switch-on currents of the devices are generally specified in the technical data. The relay is switched off through opening of a mechanical contact. An arc burns for a short moment and warms the contact. For an inductive load (coil) a large part of the magnetic energy stored in the coil is additionally released as heat at the contact. This load on the contact determines the service life of the relay and is called the electrical service life. The mechanical service life is defined as the number of switching operations without current flow through the contact. 2-channel relay output terminal, 230 V AC/30 V DC Technical data EL2602 | ES2602 Connection technology relay output Load type ohmic, inductive, lamp load Number of outputs 2 x make contacts for power contact 2 6 3 7 4 8 Nominal voltage 230 V AC/30 V DC Current consumption load-dependent power contacts Current consumption E-bus typ. 170 mA Distributed clocks – Ohmic switching current 5 A AC/DC per channel Inductive switching 2 A AC/DC per channel current Operating cycles mech. 2 x 10 7 (min.) Operating cycles electr. 1 x 10 5 (5 A/30 V DC) (min.) Lamp test, electronic 4 x 58 W ballast Minimum permitted load 10 mA at 5 V DC Special features 1-wire connection possible Operating temperature 0…+55 °C Approvals CE, UL Weight approx. 50 g Further information www.beckhoff.com/EL2602 We reserve the right to make technical changes.
1 5 EL26xx Digital output 2-channel relay output terminal, 230 V AC/30 V DC 2-channel relay output terminal, 230 V AC, 300 V DC 2-channel relay output terminal, 125 V AC/30 V DC 4-channel relay output terminal, 125 V AC/30 V DC EL2622 | ES2622 EL2652 | ES2652 EL2612 | ES2612 EL2624 | ES2624 ohmic EtherCAT Terminal 135 2 x make contacts 2 x change-over 2 x change-over 4 x make contacts 1 5 1 5 1 5 2 6 2 6 2 6 2 6 3 7 3 7 3 7 3 7 4 8 4 8 4 8 4 8 230 V AC/30 V DC 230 V AC (max. switching voltage 125 V AC/30 V DC 125 V AC/30 V DC 250 V AC/300 V DC) – – – – typ. 170 mA 180 mA typ. 150 mA typ. 200 mA – – – – 5 A AC/DC per channel 3 A AC/DC (at 30 V DC), 1 A AC/DC 0.5 A AC/2 A DC per channel 0.5 A AC/2 A DC per channel (at 40 V DC), 0.15 A DC (at 300 V DC), for UL: 1 A, max. 230 V AC 2 A AC/DC per channel no data no data no data 2 x 10 7 5 x 10 6 1 x 10 8 1 x 10 8 1 x 10 5 (5 A/30 V DC) 1 x 10 6 (1 A/250 V AC ohmic load) 2 x 10 5 (1 A/30 V DC) 2 x 10 5 (1 A/30 V DC) 4 x 58 W – – – 10 mA at 5 V DC 100 mA (12 V DC) 10 µA at 10 mV DC with intact contact coating 10 µA at 10 mV DC with intact contact coating – reverse switching realisable signal relay – 0…+55 °C 0…+55 °C 0…+55 °C 0…+55 °C CE, UL CE, UL CE, UL CE, UL approx. 50 g approx. 55 g approx. 50 g approx. 50 g www.beckhoff.com/EL2622 www.beckhoff.com/EL2652 www.beckhoff.com/EL2612 www.beckhoff.com/EL2624 We reserve the right to make technical changes.