Boards for HiPath 3000
P31003-H3550-S403-4-7620, 02/05
3-350 HiPath 3000 V5.0, HiPath 5000 V5.0, 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 CBSAP board.
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.
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