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3.4.11 REAL

Functions

The tasks of the REAL (S30807-Q5913-X) board in Hicom 150 E OfficePro are divided into two functional areas (see Figure 3-102):

Relay
Four individual, controllable relays (K1 to K4) are available for special connections. The relays are energized by the CBMOD board via the REAL socket X05 connecting cable. The switch contacts for all relays are floating and protected by surge protectors.
In addition, a -48 V line protected by positive-temperature-coefficient resistors is routed to the main distribution frame and can be used there for external applications (80 mA maximum).
Trunk failure transfer
This function is provided by two relays (K5, K6) with two switch contacts each. 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. The system monitors the line's loop current to avoid disconnecting any trunk calls in progress when the power is restored.
In normal mode, the relays are activated:
The trunk is connected to the line trunk module.
The subscriber line is connected to the SLA16 subscriber line module.
In the event of a power failure or during a restart or reload (low potential of trunk failure transfer signal from -CBMOD), the relays are deactivated:
As a result, the signals to the line trunk module and subscriber line module are split and the trunk is connected directly to the subscriber line. (This is the way you must wire the connections as well).
If the power supply voltage returns after an interruption and a trunk call is in progress, activation of the trunk failure transfer relay is prevented (by optocoupler).

Relay Specifications

The electrical characteristics of the relays are as follows:

Operating voltage: 12 Vdc
Trunk failure transfer power consumption: 40 mA at 12 V nominal voltage
Power consumption per relay: 20 mA at 12 V nominal voltage
Trunk failure transfer contact load: 60 mA at -60 V nominal voltage
Maximum trunk failure transfer contact load with atmospheric influence: 8 A
Contact load for relays K1 to K4: 1 A at 250 V AC
Maximum current drain at -48 VF: 80 mA

Installation of the REAL Board (Backplane)

The REAL board is connected to the backplane (basic cabinet only) via a ribbon cable (X05) and to the main distribution frame.

Outside the U.S.: via an SU cable connector (X06, Figure 3-99).

In the U.S.: via a 25-pair cable connector (X8 REAL MDF, Figure 3-100)

Figure 3-99 Installation Location of the REAL Board (Not for U.S.)

Figure 3-100 Installation Location of the REAL Board (for U.S. Only)

Relay Contacts of the REAL Board (Not for U.S.)

Figure 3-101 Relay Contacts (De-Energized) and MDFU Interfaces (Not for U.S.)

REAL Module Relay Contacts (Backplane and MDF) (for U.S. Only)

Figure 3-102 Relay Contacts (De-Energized: Power-Failure Mode) (for U.S. Only)

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