Page 53 - EPR Catalog 2015

CT-S range
Function diagrams

A+ Accumulative ON-delay B OFF-delay with auxiliary voltage
(Accumulative delay on make) (Delay on break)
CT-MVS CT-MFS, CT-MBS, CT-AHS 1

This function requires continuous control supply voltage for This function requires continuous control supply voltage for
timing. timing.
Timing begins when control supply voltage is applied. The If control input Y1-Z2 is closed, the output relay energizes
green LED flashes during timing. When the selected time immediately. If control input Y1-Z2 is opened, the time delay
delay is complete, the output relay energizes and the flashing starts. The green LED flashes during timing. When the se-
green LED turns steady. lected time delay is complete, the output relay de- energizes
Timing can be paused by closing control input A1-Y1/B1. The and the flashing green LED turns steady.
elapsed time t1 is stored and continues from this time value If control input Y1-Z2 closes before the time delay is com-
when A1-Y1/B1 is re-opened. plete, the time delay is reset and the output relay does not
This can be repeated as often as required. change state. Timing starts again when control input Y1-Z2
If control supply voltage is interrupted, the output relay de- re-opens.
energizes and the time delay is reset. Pause timing / Accumulative OFF-delay (CT-MFS):
Timing can be paused by closing control input X1-Z2. The
A1-A2 2CDC 252 043 F0206 elapsed time t1 is stored and continues from this time value
A1-Y1/B1 when X1-Z2 is re-opened.
15-18, 25-28 This can be repeated as often as required.
15-16, 25-26 If control supply voltage is interrupted, the output relay de-
energizes and the time delay is reset.
21-24
21-22
green LED

t t1 t3 t2

t = adjusted time delay t1 + t2 = t A1-A2 2CDC 252 019 F0206
t3 = pause timing Y1-Z2
15-18, 25-28
15-16, 25-26
21-24
21-22
X1-Z2
green LED

t t1 t3 t2

t = adjusted time delay t1 + t2 = t
t3 = pause timing

B OFF-delay with auxiliary voltage B OFF-delay without auxiliary voltage
(Delay on break) (True delay on break)
CT-MVS, CT-APS CT-ARS

This function requires continuous control supply voltage for The OFF-delay function without auxiliary voltage does not
timing. require continuous control supply voltage for timing. After a
If control input A1-Y1/B1 is closed, the output relay energizes storage time of several months without any voltage, a format-
immediately. If control input A1-Y1/B1 is opened, the time ting time of about 5 minutes is necessary.
delay starts. The green LED flashes during timing. When the Applying control supply voltage energizes the output relay
selected time delay is complete, the output relay de-energizes immediately. Applied control supply voltage is displayed by
and the flashing green LED turns steady. the glowing green LED. If control supply voltage is interrupted,
If control input A1-Y1/B1 recloses before the time delay is the OFF-delay starts and the LED turns off. When timing is
complete, the time delay is reset and the output relay does complete, the output relay de-energizes.
not change state. Timing starts again when control input A1- For correct operation of the unit, it is necessary to complete
Y1/B1 re-opens. the minimum energizing time. As soon as timing starts, the
If control supply voltage is interrupted, the output relay de- LED turns off.
energizes and the time delay is reset.

A1-A2 2CDC 252 020 F0206 A1-A2 2CDC 252 021 F0206
A1-Y1/B1 15-18, 25-28
15-18, 25-28 15-16, 25-26
15-16, 25-26
green LED
21-24
21-22 t
green LED

t <t t = adjusted time delay

t = adjusted time delay

2CDC 110 004 C0210 | Catalog Electronic Products and Relays 2015 | ABB 1/42