Page 54 - EPR Catalog 2015

CT-S range
Function diagrams

AB Symmetrical ON-delay and OFF-delay AB Symmetrical ON-delay and OFF-delay
(Symmetrical delay on make and delay on break)
1 (Symmetrical delay on make and delay on break) CT-MVS

CT-MFS, CT-MBS

This function requires continuous control supply voltage for This function requires continuous control supply voltage for

timing. timing.

Closing control input Y1-Z2 starts the ON-delay t1. When tim- Closing control input A1-Y1/B1 starts the ON-delay t1. When
ing is complete, the output relay energizes. Opening control timing is complete, the output relay energizes. Opening

input Y1-Z2 starts the OFF-delay t2. Both timing functions are control input A1-Y1/B1 starts the OFF-delay t2. Both timing
displayed by the flashing green LED. When the OFF-delay t2 is functions are displayed by the flashing green LED. When the
complete, the output relay de-energizes.
OFF-delay t2 is complete, the output relay de-energizes.
If control input Y1-Z2 opens before the ON-delay t1 is com- If control input A1-Y1/B1 opens before the ON-delay t1 is
plete, the time delay is reset and the output relay remains de- complete, the time delay is reset and the output relay re-

energized. If control input Y1-Z2 closes before the OFF-delay mains de-energized. If control input A1-Y1/B1 closes before

t2 is complete, the time delay is reset and the output relay the OFF-delay t2 is complete, the time delay is reset and the
remains energized. output relay remains energized.

Pause timing / Accumulative, symmetrical ON-delay and If control supply voltage is interrupted, the output relay de-

OFF-delay (CT-MFS): Timing can be paused by closing control energizes and the time delay is reset.

input X1-Z2. The elapsed time t1a or t2a is stored and contin- 2CDC 252 022 F0206A1-A2
ues from this time value when X1-Z2 is re-opened. This can 2CDC 252 023 F0206A1-Y1/B1
15-18, 25-28
be repeated as often as required. 15-16, 25-26

If control supply voltage is interrupted, the output relay de- 21-24
21-22
energizes and the time delay is reset. green LED

A1-A2 t1 t2 t1 < t2
Y1-Z2
15-18, 25-28 t1 = adjusted ON-delay
15-16, 25-26 t2 = adjusted OFF-delay
21-24 t1 = t2
21-22
X1-Z2
green LED

t1 t2 t1a t3 t1b t2a t3 t2b

t1 = adjusted ON-delay t1a + t1b = t1
t2 = adjusted OFF-delay t2a + t2b = t2
t1 = t2 t3 = pause timing

1/43 ABB | Catalog Electronic Products and Relays 2015 | 2CDC 110 004 C0210