Selection Guide
11/84
Siemens Industry, Inc.
Industrial Controls Catalog
Product Category: SMRL
3TX71 plug-in relays
Function Relays, Interfaces and Converters
Siemens / Industrial Controls Previous folio: new page
SIRIUS
RELAYS
Multifunction Timer Modes
Function Name Description
A
On Delay
(Power On)
When input voltage U is applied, timing delay t begins. Relay contacts R change state after the time delay is complete. Contacts R return to their shelf state when
input voltage U is removed. Trigger switch is not used in this function.
B
Repeat Cycle
(Starting Off)
When input voltage U is applied, time delay t begins. When time delay t is complete, relay contacts R change state for time delay t. This cycle will repeat until input
voltage U is removed. Trigger switch is not used in this function.
C
Interval
(Power On)
When input voltage U is applied, relay contacts R change state immediately and timing cycle begins. When time delay is complete, contacts return to shelf state.
When input voltage U is removed, contacts will also return to their shelf state. Trigger switch is not used in this function.
D
Off Delay
(S Break)
Input voltage U must be applied continuously. When trigger switch S is closed, relay contacts R change state. When trigger switch S is opened, delay t begins.
When delay t is complete, contacts R return to their shelf state. If trigger switch S is closed before time delay t is complete, then time is reset. When trigger switch
S is opened, the delay begins again, and relay contacts R remain in their energized state. If input voltage U is removed, relay contacts R return to their shelf state.
E
Retrigerable
One Shot
Upon application of input voltage U, the relay is ready to accept trigger signal S. Upon application of the trigger signal S, the relay contacts R transfer and the pre-
set time t begins. At the end of the preset time t, the relay contacts R return to their normal condition unless the trigger switch S is opened and closed prior to time
out t (before preset time elapses). Continuous cycling of the trigger switch S at a rate faster than the preset time will cause the relay contacts R to remain closed. If
input voltage U is removed, relay contacts R return to their shelf state.
F
Repeat Cycle
(Starting On)
When input voltage U is applied, relay contacts R change state immediately and time delay t begins. When time delay t is complete, contacts return to their shelf
state for time delay t. This cycle will repeat until input voltage U is removed. Trigger switch is not used in this function.
G
Pulse
Generator
Upon application of input voltage U, a single output pulse of 0.5 seconds is delivered to relay after time delay t. Power must be removed and reapplied to repeat
pulse. Trigger switch is not used in this function.
H One Shot
Upon application of input voltage U, the relay is ready to accept trigger signal S. Upon application of the trigger signal S, the relay contacts R transfer and the pre-
set time t begins. During time-out, the trigger signal S is ignored. The relay resets by applying the trigger switch S when the relay is not energized.
I
On/Off Delay
(S Make/Break)
Input voltage U must be applied continuously. When trigger switch S is closed, time delay t begins. When time delay t is complete, relay contacts R change state
and remain transferred until trigger switch S is opened. If input voltage U is removed, relay contacts R return to their shelf state.
J
Memory Latch
(S Make)
Input voltage U must be applied continuously. Output changes state with every trigger switch S closure. If input voltage U is removed, relay contacts R return to
their shelf state.
Access.
Series
MOV MOV MOV R/C R/C Diode LED Green LED Green
24VAC/DC 120VAC/DC 240VAC/DC 6-24VAC/DC 110-240VAC/DC 6-250VDC 24VAC/DC 120VAC/DC
A 3TX7144-H1 3TX7144-H2 3TX7144-H3 3TX7144-H4 3TX7144-H5 3TX7144-H6 3TX7144-H7 3TX7144-H8
B 3TX7144-H9 3TX7144-H17 — — 3TX7144-H12 3TX7144-H13 —
Socket Accessories
10IC11_79-99.indd 84 2/3/11 9:05 PM
• Revised •
03/21/2011