1
2.
CONNECTIONS
PMB132-V
and
PMB132/12-V
stations must be connected to the ‘
EMERGENCY UNITS
’ of the
PA8506-V
system.
It is
possible to connect up to 7 remote stations in cascade formation
by means of the
IN/OUT
(
10
) sockets provided for
this purpose, which can be used as inputs or outputs as required. Special attention must be paid to assigning correctly
the logical addresses to each station (see point 4.1, “Address”, page 19).
The connections to the stations are made by means of
CAT5e SF/UTP
shielded cable and a shielded STP connector.
For these cables
EIA/TIA T568A
and
EIA/TIA T568B
(and the associated
RJ45
connectors) standards require the pinouts
and colour schemes shown in the table:
8 7 6 5
4 3 2 1
Pin 8
Pin 1
1 2 3 4
5 6 7 8
Pin 1
Pin 8
T568A
T568B
IN/OUT
PIN
Colour
Colour
Function
1
White/Green
White/Orange
Audio +
2
Green
Orange
Audio -
3
White/Orange
White/Green
GND
4
Blue
Blue
Not connected
5
White/blue
White/Blue
Not connected
6
Orange
Green
+Vdc
7
White/Brown
White/Brown
8
Brown
Brown
Serial -
Shield
Shield
Shield
GND
The table also shows the pinouts for the
IN/OUT
connectors (
10
).
N.B.!
Cross-cables are not permitted.
All the connectors must be shielded RJ45
connectors.
2.1 Sizing
Using shielded CAT5e SF/UTP cable, it is possible to apply the following limits:
1 station
= total length
max 300m
2 stations
= total length
max 200m
3 stations
= total length
max 100m
For systems with more than 3 stations connected to them, at distances greater than those indicated above, each
station will also have a local power supply providing a continuous stabilised current of 24Vdc/500mA, using the socket
provided for this purpose on the rear (
9
).
