Reals - Siemens HiPath 3000 Service Manual

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3.4.14

REALS

Introduction
The REALS (Relais and ALUM for SAPP) board is used in HiPath 3800 to provide the following
functions:
Four individual, controllable relays are available for special connections, such as door
●
openers.
The switch contacts for all relays are floating and protected by surge protectors.
Electrical characteristics of the relays are as follows:
– Maximum current drain at – 48 V: 80 mA
– Operating voltage: + 5 V
– Contact current: max. 1.25 A
– Contact power: max. 30 W
Trunk failure transfer (ALUM)
●
In the event of a power failure or a system restart or reload, an analog trunk is transferred
from the system to an analog telephone. If the power supply voltage returns after an inter-
ruption and a trunk call is in progress, activation of the trunk failure transfer relay is prevent-
ed by optocoupler.
ALUM relay electrical data:
– Operating voltage: + 5 V
– Contact current: max. 1.25 A
– Contact power: max. 30 W
All of the functions are controlled by the
Two –48-V lines fused using a PTC resistor are available for external applications. Signals are
picked up via MDFU-E (Table 3-164: M48VF1 / 0V_F and M48VF2 / 0V_F). Each trunk has a
maximum load capacity of 300 mA.
3-350
CBSAP board.
HiPath 3000 V5.0, HiPath 5000 V5.0, Service Manual
P31003-H3550-S403-4-7620, 02/05