3RT1/3RH1 contactors
SIRIUS System Manual
3-70
GWA 4NEB 430 0999-02b
Circuit diagrams
3RT1926-2C 3RT1926-2D
on-delay off-delay with auxiliary supply
Figure 3-51: Solid-state time relay with semiconductor output, circuit diagrams
Function diagrams
3RT1926-2C..1, on-delay 3RT1926-2D..1, off-delay
Figure 3-52: 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.
N(L-)
L1(L+)
K2
A2
A1
K1
A1
A1
A2
A2
K2:3RT102. U
S
= 24 V to 240 VAC/DC
3RT103. U
S
= 24 V to 240 VAC/DC
3RT104. U
S
= 48 V to 240 VAC/DC
N(L-)
L1(L+)
K2
A2
A1
K1
A1
A1
A2
A2
A2
B1
S1
K2:3RT102. U
S
= 24 V to 240 VAC/DC
3RT103. U
S
= 24 V to 240 VAC/DC
3RT104. U
S
= 48 V to 240 VAC/DC
✘
Connection prohibited!
Can be connected if required
NSK-7937a
A1/A2
A1/A2
t
Time relay
Contactor
NSK-7938a
A1/A2
A1/A2
B1/A2
35 ms
>
t
Time relay
Contactor
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