Park Air Systems Limited B6525MDR User Manual
31-3MDR00HB
Page 43
Installation
Draft
Facilities Connector
A 25-way D-type filtered socket providing analogue and HDLC interfaces. The connector is shown in
Fig 10 and the pin-out listed in Table 11. A suitable 25-way D-type plug to connect to this interface is
listed in
A 25-way D-type filtered socket providing analogue and HDLC interfaces. The connector is shown in
Fig 10 and the pin-out listed in Table 11. A suitable 25-way D-type plug to connect to this interface is
listed in
Fig 10 Facilities Connector Pin-out
Table 11 Facilities Connector
Pin
Signal Name
Characteristic
Input or Output
1
Ground
0 V.
2
Line in –
Balanced 600 ohm, -20 to +10 dBm.
Phantom Keying:
Phantom PTT active when the input differs from the
reference by more than 10 V. Reference voltage
(common to PTT input on pin 25) is programmable to
+14, 0 or -14 V (all ±1 V).
reference by more than 10 V. Reference voltage
(common to PTT input on pin 25) is programmable to
+14, 0 or -14 V (all ±1 V).
Phantom PTT inactive when the input differs from the
reference by less than 1 V
reference by less than 1 V
Maximum input level ±60 V with respect to reference.
Input requires at least 1 mA to operate and draws no
more that 6 mA.
more that 6 mA.
Configurable active high or low.
Input
3
Signal strength
Between 0 and 5 V.
Output
4
Line out
+
Balanced 600 ohm, -20 to +10 dBm.
Output
5
Ground
0 V.
6
HDLC 0 TX B
RS422 differential synchronous data at 128 kbits per
second.
second.
Output
7
HDLC 0 RX B
RS422 differential synchronous data at 128 kbits per
second.
second.
Input
8
HDLC 0 CL B
RS422 differential synchronous data at 128 kbits per
second.
second.
Output
9
HDLC 1 TX B
RS422 differential synchronous data at 128 kbits per
second.
second.
Output
10
HDLC 1 RX B
RS422 differential synchronous data at 128 kbits per
second.
second.
Input
continued ...
13
1
25
14