REF16-S101-DC24V-1A ETA Electronic circuit breaker

The REF16-S unit expands the product group "electronic overcurrent protection" for DC 24 V applications.
It selectively protects all DC 24 V load circuits with a width of only 12.5 mm. This is achieved by a combination of active electronic current limitation in the event of a short circuit and an overload cut-off at typ. 1.25 x IN. In combination with the E-T-A plug-in bases 80plus and 81plus, the REF16-S
can be mounted quickly, conveniently and flexibly. The bases allow current distribution and signal distribution via pluggable bridges.
In addition, the REF16-S is latched to the base and can be assigned to fixed current ratings or slots with a coding pin. The installation dimensions comply with the DIN 43880 installation device standard.

DC 24 V switched-mode power supplies are used very frequently in automation technology. However, in the event of an overload, they regulate the output voltage that is to supply all connected loads. So if a fault occurs in a single load in the system, the voltage also collapses in all other load circuits. This often results not only in an undefined fault condition, but even in a standstill of the machine or system.

This is exactly where the REF16-S intervenes by reacting to the overload condition faster than the switching power supply. The maximum possible overcurrent is always limited to typically 1.25 times the selected rated current (see Table 1). This makes it possible to switch on capacitive loads up to 20,000 μF, but they are switched off in the event of an overload or short circuit. For adaptation to the load conditions, the rated current is available in fixed values of 0.5 A...10 A. Operating and error states are indicated by a multi-coloured LED, a potential-free signal contact or by an integrated short-circuit-proof status output. Remote actuation is possible via a remote reset signal or a remote ON/OFF control signal. The manual ON/OFF switch directly on the unit allows targeted commissioning of individual load circuits.

As soon as the REF16-S detects overload or short-circuit in its load circuit, it blocks the load output transistor and thus interrupts the current flow in the faulty circuit. Once the fault has been rectified, the REF16-S load output is reactivated by an electronic reset signal or manually by pressing the ON/OFF switch directly on the unit.

Key features:l Pluggable into socket 80plus and socket 81plus
- Active linear current limiting
l Capacitive loads up to 20,000µF
l Rated current in fixed amperages 0.09 A...10 A
l Unit plus socket comply with the installation dimensions according to DIN 43880
l Approvals: UL, CSA, GL
l Meets requirements according to NEC Class 2
l OPTION: Control inputs, signalling

Technical details:

Approvals:

*) cULus (listed) and CSA when used
with socket 80plus or socket 81plus