Siemens 3RP25

Description
3.3 Device versions
3RP25 Time Relays
16 Manual, 09/2019, A5E31947765002A/RS-AC/003
● Two-wire timing relays
In conjunction with contactors, they have the following advantages compared to
conventional timing relays:
– Reduced wiring
– Bounce-free control
– The solid-state output enables increased service life as there is no mechanical wear
● Multifunction timing relay with 1 CO contact and 13 functions (A-M) or 2 CO contacts and
27 functions (A-M + YD). The unit can be set as a 2 CO contact unit (2CO) or 1 CO
contact + 1 CO contact unit (1CO+1CO):
Function
- 1CO: 1 CO contact
- 1NO: 1 NO contact
- 2CO: 2 CO contacts, parallel contacts
- 1CO+1CO: 1 CO contact delayed + 1
instantaneous CO contact
- Star-delta (wye-delta) function
A
ON-delay
ON-delay and instantaneous contact
B OFF-delay with control signal OFF-delay with control signal and
instantaneous contact
C ON-delay and OFF-delay with control
signal
ON-delay and OFF-delay with control signal
and instantaneous contact
D Flasher relay, symmetrical, starting with
interval
Flasher relay, symmetrical, starting with
interval and instantaneous contact
E Passing make contact, interval relay Passing make contact, interval relay and
instantaneous contact
F Retriggerable interval relay with
deactivated control signal (passing
break contact with control signal)
Retriggerable interval relay with deactivated
control signal (passing break contact with
control signal) and instantaneous contact
G Passing make contact with control
signal, not retriggerable, (pulse-forming
with control signal)
Passing make contact with control signal, not
retriggerable, (pulse-forming with control
signal) and instantaneous contact
H Additive ON-delay, instantaneous OFF
with control signal
Additive ON-delay, instantaneous OFF with
control signal and instantaneous contact
I Additive ON-delay with control signal Additive ON-delay with control signal and
instantaneous contact
J Flasher relay, symmetrical, starting with
pulse
Flasher relay, symmetrical, starting with pulse
and instantaneous contact
K Pulse-delayed (pulse and pulse delay
adjustable)
Pulse-delayed (pulse and pulse delay
adjustable) and instantaneous contact
L Pulse-delayed with control signal (pulse
and pulse delay adjustable)
Pulse-delayed with control signal (pulse and
pulse delay adjustable) and instantaneous
contact
M (GND) Retriggerable interval relay with
activated control signal (watchdog)
Retriggerable interval relay with activated
control signal and instantaneous contact
(watchdog)
YD
Star-delta (wye-delta) function