Siemens EF 837 Series Especificaciones descargar pdf (Pagina 44)

LED Indicators Section 4 Operation

44 3BSE056248

B(attery) Green Normal state - ON

Lit when internal or external battery voltage is above 3.1 V. The LED is

controlled by a software battery voltage test

(1)

Tx Yellow Data Transmission

(2)

CN1 + CN2 and COM3 + COM4

Flashes in synchronization with Tx traffic

Rx Yellow Data Reception

(2)

, CN1 + CN2 and COM3 + COM4

Flashes in synchronization with Rx traffic

Valid for PM8xx in redundant operation

PRIM(ary Yellow Lit in single and redundant configuration.

Indicates Primary CPU in redundant configuration. Controlled by

software.

DUAL Yellow Lit when the CPU is running in redundant configuration and

synchronized state.s

(1) The software performs cyclic battery voltage level tests via a dedicated LED control input. The battery provides

back-up power for both the application memory and the real time clock during power down. The battery is either

accessible via the PM8xx cover panel or externally connected to the external battery connector. Battery voltage is

checked by the software. Voltage is common for both the internal and external battery. For this reason the internal

battery should be removed when using the external battery, since having two batteries connected in parallel will

result in greatly reduced capacity.

(2) Only CN1 for PM851. Do not connect to CN2

Table 1. PM8xx - LED Indicators (Continued)

Marking Color Function

1 2 ... 39 40 41 42 43 44 45 46 47 48 49 ... 67 68

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Siemens EF 837 Series Especificaciones Pagina 44