8
05.01
8.2 Infeed modules
8-245
© Siemens AG 2008 All Rights Reserved
SIMODRIVE 611 Configuration Manual (PJU) – 05/2008 Edition
8.2.5 Timing diagram for the ready signal in the I/R module
The diagram below shows the initial state of terminals 48, 63, and 64 (jump-
ered) when the I/R module is delivered. For a description of terminals 72 to 74,
see Section 8.2.2.
Shutdown using the main switch, an external
line contactor or other switching elements.
Load line
supply
present
C
Supply voltage
Network failure
Supply voltage
B
T. 48
T. 64
T. 63
Ready
T. 72...74
A
AAA
A
t
Fig. 8-5 Timing diagram for the ready signal in the I/R module
Switch S1.2 = OFF default setting in the I/R module ”Ready signal”
The ready relay can only pull–in if pre–charging has been completed and the
internal line contactor has pulled–in.
When the power fails (line supply failure), the I/R module is internally inhibited.
This means that the I/R module can no longer regulate the DC link voltage
which means that no braking energy can be fed back into the line supply (no
regenerative feedback). The drives are not inhibited, but the ready relay drops–
out after the power failure detection time with a delay that depends on the line
supply impedances.
When the line supply is switched off using the main switch or other switching
elements, ensure that the terminal 48 on the I/R module is open at least 10 ms
beforehand if other external parallel loads are also present in the switchgear
cabinet (see Chapter 7.3.6).
A
B
C
8 Im
ortant Circuit Information02.0705.08
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