Specifications

Table Of Contents
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PLS8-X/PLS8-V Hardware Interface Description
3.3 Power-Up / Power-Down Scenarios
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PLS8-X_PLS8-V_HD_v03.016 2015-12-09
Confidential / Released
Page 32 of 105
3.3.6 Turn off PLS8-X/PLS8-V in Case of Emergency
Caution: Use the EMERG_OFF line only when, due to serious problems, the software is not
responding for more than 5 seconds. Pulling the EMERG_OFF line causes the loss of all infor-
mation stored in the volatile memory. Therefore, this procedure is intended only for use in case
of emergency, e.g. if PLS8-X/PLS8-V does not respond, if reset or shutdown via AT command
fails.
The EMERG_OFF line is available on the application interface and can be used to switch off
the module. To control the EMERG_OFF line it is recommended to use an open drain / collector
driver.
To switch off, the EMERG_OFF line must be pulled to ground for longer than 40 milliseconds.
After the 40 milliseconds and an additional delay period of 500 milliseconds the module shuts
down as shown in Figure 8.
Figure 8: Shutdown by EMERG_OFF signal
Note: The power supply voltage (BATT+) may be disconnected or switched off only after having
reached Shut Down as indicated by the PWR_IND signal going high. The power supply has to
be available (again) before the module is restarted.