Electronic timer CT-MFD.12 Multifunctional with c/o contact Data sheet Features Rated control supply voltage 2448 V DC, 24240 V AC Multifunction timer with 7 timing functions: ONdelay, OFFdelay with auxiliary voltage, impulseON, impulseOFF with auxiliary voltage, flasher starting with ON, flasher starting with OFF, pulse former 7 time ranges (0.05 s 00 h) in one device c/o contact (250 V / 6 A) Control input: voltagerelated triggering, polarized, capable of switching a parallel load 2 LEDs for status indication Width of only 7.5 mm Lightgrey enclosure in RAL 7035 Approvals UL 508, CAN/CSA C22.2 No. 4 A aa Rotary switch for the Rotary switch for the D GOST prpreselection of the time eselection of the time K CB scheme rangerange E CCC bb Potentiometer with dirPotentiometer with direct ect Marks rreading scale for the fine eading scale for the fine adjustment of the time adjustment of the time a CE delaydelay b CTick cc Rotary switch for the Rotary switch for the Order data prpreselection of the timing eselection of the timing functionfunction Type Rated con- Time range Output Control in- Order code trol supply put dd U: grU: green LED een LED voltage VV contrcontrol supply voltage ol supply voltage applied applied CTMFD.2 2448 V DC, 0.05 s 00 c/o voltage SVR 500 020 R0000 WW 24240 V AC h contact related timingtiming triggering ee R: yellow LED R: yellow LED VV Application output routput relay enerelay energizedgized With their structural form and their width of 7.5 mm only, the CTD range timers are ideally suited for installation in distribution cabinets. ff CirCircuit diagramcuit diagram Multifunction timers are ideally suited for service and maintenance applications, because one device can replace a number of time relays with different functions, voltage and time ranges. This reduces inventory gg Function diagramFunction diagram and saves money. Operating mode The CTMFD.2 has c/o contact and pr ovides 7 timing functions. The function is rotary switch selecta ble on the front of the unit. Each function is indicated by an international function symbol. One of 7 time delay ranges, from 0.05 s to 00 h, can be selected with another r otary switch. The fine adjustment of the time delay is made via an internal potentiometer, with a direct reading scale, on the front of the unit. ABB 2CDC 251 089 F0t02CDC 251 089 F0t066Electronic timer CT-MFD.12 Multifunctional with c/o contact Data sheet Function diagram(s) A ON-delay This function requires continuous control supply voltage for timing. Timing begins when control supply voltage is applied. The green LED flashes during timing. When the selected time delay is complete, the output relay energizes and the flashing green LED turns steady. If control supply voltage is interrupted, the output relay deenergizes and the time delay is reset. Control input A1-Y1/B1 is disabled when this function is selected. A1-A2A1-A2 15-1815-18 15-1615-16 grgreen LEDeen LED tt << tt t = adjusted time delayt = adjusted time delay B OFF-delay with auxiliary voltage This function requires continuous control supply voltage for timing. If control input A1-Y1/B1 is closed, the output relay energizes immediately. If control input A1-Y1/B1 is opened, the time delay starts. The green LED flashes during timing. When the selected time delay is complete, the output relay deenergizes and the flashing green LED turns steady. If control input A1-Y1/B1 recloses before the time delay is complete, the time delay is reset and the out put relay does not change state. Timing starts again when control input A1-Y1/B1 reopens. If control supply voltage is interrupted, the output relay deenergizes and the time delay is reset. A1-A2 A1-A2 A1-Y1/B1 A1-Y1/B1 15-1815-18 15-1615-16 grgreen LEDeen LED tt < < tt t = adjusted time delayt = adjusted time delay CB Impulse-OFF with auxiliary voltage This function requires continuous control supply voltage for timing. If control supply voltage is applied, opening control input A1-Y1/B1 energizes the output relay immedi ately and starts timing. The green LED flashes during timing. When the selected pulse time is complete, the output relay deenergizes and the flashing green LED turns steady. Closing control input A1-Y1/B1, before the time delay is complete, deenergizes the output relay and resets the time delay. If control supply voltage is interrupted, the output relay deenergizes and the time delay is reset. A1-A2 A1-A2 A1-Y1/B1A1-Y1/B1 15-1815-18 15-1615-16 grgreen LEDeen LED tt < < tt t = adjusted pulse timet = adjusted pulse time ABB 2 2CDC 252 038 F02072CDC 252 038 F0207 2CDC 252 036 F02072CDC 252 036 F0207 2CDC 252 035 F02072CDC 252 035 F0207