4000 Digital Series II Issue 2.1 Technical Manual
STA0381 Page 79
4.4.3 PDE4644 - Digital matrix card
Figure 74 - PDE4644 Digital Matrix Card
PDE4644 is an optional quarter-sized PDE3601A for fitting onto a PDE4642 in the case of small
systems.Refer to PDE3601A for further information.
4.4.4 PD 3901 - Beltpack Interface
The PD 3901 is a 1U x 19" mains powered Interface Rack. The Interface can accommodate up to four
beltpack rings (for BPS1010 beltpacks) with programme sound, for connection to and from 4000 Digital
Series matrices.
The circuitry required to drive each ring and interface to the 4000 analogue I/O is provided by the PDE
1705 IFB Card. This is fully described in the HANDi-COM Handbook. The DC power for the rings and
the PDE 1705 cards is provided by the PDE 554 DC regulator card. This card provides ±19V @ 1.0A.
The Unit is supplied equipped for two rings as standard. The components to add additional rings to, a
maximum of four, can be added as required. Each ring can have up to 10 beltpacks connected to it.
Access is provided to drive the call lamps on the beltpacks. Similarly the call detect outputs from the
beltpacks are available for external switching use etc.
-5 Volts LED on if -5V present
Status
Flashes for correct card operation. (A faster rate indicates
increased data transfer)
Initialized Matrix has recognised and initialised card.
Table 3: PDE4606B LEDs
G
R
G
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