Product Overview

3RT1 contactors/3RH1 control relays
SIRIUS System Manual
GWA 4NEB 430 0999-02 DS 01
3-99
Circuit diagrams 3RT19 26-2C... 3RT19 26-2D...
on-delay off-delay (with auxiliary supply voltage)
Frame size S0 to S3 Frame size S0 to S3
Fig. 3-59: Solid-state time relay with semiconductor output, circuit diagrams
Function diagrams 3RT19 26-2C..1, on-delay 3RT19 26-2D..1, off-delay
Fig. 3-60: Solid-state time relay with semiconductor output, function diagrams
3.4.4 Additional load module (3RT1916-1GA00)
Field of application The additional load module for the contactors of frame size S00 is used to
increase the permissible residual current and to limit the residual voltage of
SIMATIC semiconductor outputs.
Mode of operation Malfunctions can sometimes occur when SIRIUS contactors and auxiliary
contactors of frame size S00 work together with SIMATIC output modules
whose residual current at signal "0" is higher than is permissible for the con-
tactors of frame size S00. The maximum permissible residual current of the
electronic components is 3 mA for contactors of frame size S00 with a
230 VAC drive, and in the case of higher residual currents, the contactors no
longer drop down.
The additional load module is used to ensure the safe switching off of S00
contactors in the case of direct control by programmable controllers via
230 VAC semiconductor outputs.
The additional load module takes on the function of overvoltage damping at
the same time.
¿ time relay block
À contactor
N/L
NSB00556
L1/L+
A2
A2
A2
A1
A1
A1
1
2
N/L
NSB00557
L1/L+
S1
A2
A1 B1
A2
A2
A1
A1
1
2
A2 can either be connected to
the contactor or the timing
relay with N(L-).
- - - connect as preferred
A2 may only be connected
with N(L-) from the timing
relay
x do not connect!
NSK-7937a
A1/A2
A1/A2
t
Time relay
Contactor
NSK-7938a
A1/A2
A1/A2
B1/A2
35 ms
>
t
Time relay
Contactor