Page 21 - EPR Catalog 2015

CT-D range
Function diagrams

1

DA Flasher, starting with the ON time DB Flasher, starting with the OFF time
(Recycling equal times, ON first) (Recycling equal times, OFF first)
CT-EBD, CT-MFD CT-MFD

Applying control supply voltage starts timing with symmetrical Applying control supply voltage starts timing with symmetrical
ON & OFF times. The cycle starts with an ON time first. The ON & OFF times. The cycle starts with an OFF time first. The
ON & OFF times are displayed by the flashing green LED, ON & OFF times are displayed by the flashing green LED,
which flashes twice as fast during the OFF time. which flashes twice as fast during the OFF time.
If control supply voltage is interrupted, the output relay If control supply voltage is interrupted, the output relay
de-energizes and the time delay is reset. de-energizes and the time delay is reset.
Control input A1-Y1/B1 of the CT-MFD is disabled when this Control input A1-Y1/B1 of the CT-MFD is disabled when this
function is selected. function is selected.

A1-A2 2CDC 252 029 F0206 A1-A2 2CDC 252 030 F0206
15-18, 25-28 15-18, 25-28
15-16, 25-26 15-16, 25-26

green LED green LED

tt

t = adjusted flashing time tt

t = adjusted flashing time

H Pulse former (Single shot) E Pulse generator, starting with the ON or OFF time
CT-MFD (Recycling unequal times, ON or OFF first)
CT-TGD
This function requires continuous control supply voltage for
timing. This function requires continuous control supply voltage for
Closing control input A1-Y1/B1 energizes the output relay timing.
immediately and starts timing. Operating the control contact Applying control supply voltage, with open control input
switch A1-Y1/B1 during the time delay has no effect. The A1-Y1/B1, starts timing with an ON time first. Applying
green LED flashes during timing. When the selected ON time control supply voltage, with closed control input A1-Y1/B1,
is complete, the output relay de-energizes and the flashing starts timing with an OFF time first. The ON & OFF times are
green LED turns steady. After the ON time is complete, it displayed by the flashing green LED, which flashes twice as
can be restarted by closing control input A1-Y1/B1. fast during the OFF time.
If control supply voltage is interrupted, the output relay The ON & OFF times are independently adjustable.
de-energizes and the time delay is reset. If control supply voltage is interrupted, the output relay
de-energizes and the time delay is reset.
A1-A2 2CDC 252 110 F0206
A1-Y1/B1 A1-A2 2CDC 252 111 F0206
15-18, 25-28 A1-Y1/B1
15-16, 25-26 15-18, 25-28
green LED 15-16, 25-26
green LED
t t

t = adjusted pulse time t1 t2 t2 t1

t1 = adjusted OFF time
t2 = adjusted ON time

2CDC 110 004 C0210 | Catalog Electronic Products and Relays 2015 | ABB 1/10