Electronic Overcurrent Protector REF16-S Description Type REF16-S is an extension of the product group Electronic Overcurrent Protection for DC 24 V applications. REF16-S It provides selective protection for all DC 24 V load circuits at 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 overload disconnection at typically 1.25 times rated current. Plugged into an E-T-A socket, which is available with screw terminals or screwless terminals, the REF16-S provides ease of installation. The sockets allow power distribution and signalling via plug-in type jumpers. In addition the REF16-S latches on when plugged into the socket and by means of coding pins a clear assignment to current ratings or slots is possible. Dimensions are in compliance with the standard DIN 43880 for the installation of built-in units. with socket with socket DC 24 V switch-mode power supplies are widely used in automation. 80plus 81plus In the event of an overload, however, they turn down the output voltage which is meant to supply all connected loads. Therefore a Remote actuation is possible by a remote reset signal or a remote failure occurring in an individual load of the system causes a voltage control signal ON/OFF. The manual ON/OFF button on the device dip in all other load circuits. This does not only lead to an undefined allows intentional start-up of individual load circuits. fault status, but may even cause a stoppage of the machinery or plant. The REF16-S responds much faster to overload conditions than the As soon as the REF16-S identifies an overload or short circuit switch-mode power supply. It limits the max. possible overcurrent to condition in a load circuit, it will block the load output transistor and typically 1.25 times rated current (see table 1). This allows connection interrupt the current flow in the faulty circuit. Upon remedy of the of capacitive loads up to 20,000 F with disconnection only in the failure, the load output of the REF16-S will be re-activated by an event of overload or short circuit. For optimal adjustment to the load electronic reset signal or by manual operation of the ON/OFF button. conditions the REF16-S can be selected in fixed values of 0.5 A10 A. Status and failure indication is provided by a multi-coloured LED, a potential-free signal contact or by means of an integral short-circuit- proof status output. US patent number: US 9,246,266 B2 Features and benefits Your benefits l Pluggable into socket 80plus and socket 81plus l Increases system availability by means of a clear failure detection l Active linear current limitation and stable voltage supply l Capacitive loads up to 20,000 F - fixed current ratings from l Reduces downtimes through quick failure remedy 4 0.09 A to 10 A l Simplifies planning through clear sizes and ratings l protector plus socket complies with installation dimension l Saves costs and time through fast and flexible installation to DIN 43880 l Approvals: UL, CSA, GL - meets the requirements to NEC Class 2 l OPTION: Control inputs, signalling Approvals Information online The current data sheet is available on our website: Electronic Overcurrent Protector REF16-S Electronic Overcurrent Protector REF16-S Technical data Technical data Signal output SF / REF16-S101/102 Operating data Electrical data potential-free signal contact Operating voltage U DC 24 V (18...30 V) S max. DC 30 V / 0.5 A, min. 10 V / 10 mA Terminals LINE+ (1) REF16-S101 terminal: auxiliary contact, make contact GND (12(b)) Si (11(a))/Si (14(c)) open in OFF or fault condition Current rating I fixed current ratings: N REF16-S102 terminal: auxiliary contact, break contact 0.5 A, 1 A, 2 A, 3 A, 4 A, 6 A, 8 A, 10 A Si (11(a))/Si (14(c)) closed in OFF or fault condition Closed current I ON condition: typically 8 mA 0 Status output SF / REF16-S114/124 with status output SF: typically 11 mA Status output SF/ REF16-S117/127 with signal output F: typically 17 mA Electrical data Plus-switching signal output, connects Status indication l multicolour LED: U to terminal SF (14(c)) by means of Green: S Data: DC 24 V / max. 0.2 A (short-circuit- - unit is ON, load circuit is activated proof). The status output is internally Orange: blocked against GND with a 10 kOhm - in the event of overload or short resistor. circuit until electronic disconnection Red: Status output SF REF16-S114/124, at U = + 24 V S - after disconnection on grounds of Connection: SF (14(c)) + 24 V level at overload or short circuit status output anytime when: - short circuit until disconnection l device is in operating condition - low voltage in ON condition l load output is connected/green LED - device switched OFF via control is lighted input IN+ 0 V level at status output anytime when: OFF: l device is OFF or in error mode - manually switched off via ON/OFF Status output SF REF16-S117/127, at U = + 24 V S button no operating voltage Connection: SF (14(c)) 0 V level at - status output SF status output anytime when: l potential-free signal contacts F l device is in operating condition l status output SF/SF l load output is connected / l ON/OFF/ condition of switch S1 green LED is lighted + 24 V level at status output Load circuit anytime when: Load output Power-MOSFET switching output l device is OFF or in error mode (high side switch) Signal delay of signal output (F) Terminal LOAD+ (2) 4 or status output (SF) Overload and short typically 1.25 x I N OK condition typically 20 ms circuit disconnection with active current limitation Fault condition typically 200 ms Trip times see time / current characteristic Display of fault signal output or status output is in fault typically 80...800 ms depending on condition condition when rated current (see table 1) l the unit is in the OFF condition Temperature internal temperature monitoring an - due to an overcurrent disconnection disconnection delectronic disconnection - due to power failure - due to low voltage Low voltage monitoring OFF: at typically < 14 V - due to ON/OFF button operation of operating voltage ON: at typically > 17 V - due to external control input with automatic ON/OFF Control input IN+ / REF16-S114/117 Starting delay t typically 2 ms after every switch-on Start after reset and after applying U S Electrical data voltage: max. + DC 30 V high > DC 8 V DC 30 V Disconnection of electronic disconnection without low DC 3 V > 0 V load circuit physical isolation power consumption typically 2.6 mA Leakage current in load typically 1 mA (+ DC 24 V) circuit in OFF condition signal delay typically 5 ms Capacitive loads up to 20,000 F Control signal IN + + 24 V level (HIGH): device will be terminal: IN+ (11(a)) switched on by a remote ON/OFF Free-wheeling circuit external free-wheeling diode signal. 0 V level (LOW): device will be recommended with inductive load switched off by a remote ON/OFF signal Several load outputs must not be connected in parallel Switch S1 ON/OFF Unit can only be switched on with S1 if a HIGH level is applied to IN+ 2 www.e-t-a.de 2010