4
4
C
C
H
H
A
A
N
N
N
N
E
E
L
L
A
A
N
N
A
A
L
L
O
O
G
G
U
U
E
E
R
R
E
E
C
C
E
E
I
I
V
V
E
E
R
R
6
6
O
O
F
F
2
2
4
4
1
1
2
2
0
0
-
-
2
2
0
0
8
8
-
-
1
1
2
2
T
T
Y
Y
P
P
E
E
S
S
I
I
L
L
B
B
U
U
S
S
-
-
R
R
X
X
4
4
A
A
U
U
S
S
E
E
R
R
M
M
A
A
N
N
U
U
A
A
L
L
I
I
s
s
s
s
u
u
e
e
:
:
0
0
4
4
Located in the top right hand corner of the front panel are the STATUS and POWER
indication LED’s. The green power LED is illuminated whenever a 12 volt supply is
connected to the receiver. The orange status LED flashes at different rates to indicate the
operational status of the receiver, see table 2 for more details.
The front panel can be snapped out and removed by using a wide bladed flat screw driver
to gain access to the configuration (console) port and programming switch. Photograph 2
below shows the front panel removed and the location of the console port and programming
switch.
Photograph 2 Access to console port and programming switch
The black four pin console port connector and the red programming switch are located
behind the lower right corner of the front panel label.
3 THEORY OF OPERATION
The four channel analogue receiver receives four valid ANALINK or FASTLINK analogue
channels and outputs them as a 4-20mA or 0-20mA signal. Each analogue channel is
converted from a sixteen bit (Fastlink) or eight bit (Analink) value into a 0-20mA or 4-20mA
signal at the output terminals. The transmission protocol can be independently selected for
each analogue output. See Austdac document 120-009-10 for a more detailed description
of SILBUS communications.
The analogue output circuit is monitored for open circuit or loss of compliance and if one of
these conditions should occur a fault condition is generated. This fault can be transmitted
