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Panasonic Electric Works Fire & Security Technology Europe AB
MEW00290 Rev: 1
14
14.1
14.2
14.2.1
14.3
14.4
14.5
Technical Description External Presentation unit 1728
Technical data
Power supply
Nominal voltage for the Ext. Presentation unit 1728 is 24 V DC.
The number of Ext. Presentation units
from the c.i.e. is depending on all other units connected to the same
RS485 line (i.e. the current consumption).
As an alternative, the units can be power supplied from an external
20
power supply
.
RS485
The Ext. Presentation units communicate with the c.i.e. via RS485, i.e.
in EBL512 via the "Ext. FBP / DU interface board" 1587 (data rate
9600 baud), mounted in the c.i.e. and in EBL128 via the "RS485
transceiver component 4552" plugged on the mother board in the c.i.e.
In the last unit on the line, a termination resistor (120R) has to be
connected. In the Ext. Presentation unit this is done via jumper "JP8".
("JP8" shunted = the termination resistor is connected.)
Cable
The cable to be used should be LiYCY (Twisted Pairs) 2 x 2 x 0.75
2
mm
(screened - tinned copper braid) or equivalent. Cable length up
to 1200 m (theoretically). Note! The cable length is depending on the
current consumption, i.e. the type and number of units connected.
NOTE! In system EBL128 the screen is not used / connected.
2 x ELQYB 2 x 1 mm (0.75 mm
RS232
The Ext. Presentation units are equipped with an RS232 interface (J2),
which makes it possible to download new software (S/W) directly to
the Ext. Presentation unit respectively.
Connection
The Ext. Presentation units are equipped with a plug-in terminal block
(J1) for the cable connections. Up to 1.5 mm
used.
Current consumption
The current consumption is depending on the actual voltage on the
line.
18
Allowed voltage is 12 – 30 V DC.
19
On each 1582 board are up to eight addresses available. On each 1587
board are up to sixteen addresses available.
20
In this case, up to 16 units can be connected to a 1587 board. Note! Ext.
power supply fault should be indicated in the c.i.e.
19
that can be power supplied
2
) can be used.
2
27
18
conductor area can be
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