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ACM Telephone System – AMC-M-A
A100K 10430 v.1.0
3.6 RCO
There are outputs from 6 RCO relays which can be programmed to
operate external features like extra signal devices in noisy areas.
The RCO signals are taken from Line Board 1. There is a separate 8
wire cable between the ‘
RCO1-6
’ connector on the E7 exchange
backplane and the ‘
RCO – Line Card 1
’ connector J10 on the LCM.
The outputs are individually selected to be a potential free relay dry
contact or +24 V. The selection is made by the switches S1 – S6. S1 is
related to RCO1 and so on.
The devices are connected to the RELAY OUTPUT terminals marked
1K+/1K- to 6K+/6K-.
RCO 1 on 1K is reserved for PA activation. Switch S1 must be in
Poten.Free
position.
The relay contacts are rated to max. 5 A / 30 VDC or 250 VAC res. load.
The in24 V is protected by a 1 A slow fuse F2.
It is possible to use six additional RCOs by connecting a MRBD relay
board to the RIO 7-12 connector on the ACM-E7 board. (The
RCO Line
Card 2
connector on the LCM board can not be used!)
All RCO functions are programmed in AlphaPro.
3.7 PA Connection
The description below refers to SPA-V2 public address system. See
SPA manual A100K 10369 for further details. Other amplifiers may be
connected in similar way. The line input should be balanced, accepting
0.5 -1.5 Vrms (0dB) signal over 47 Kohm.
The second intercom subscriber line on line board 2 (directory no. 114)
is used as audio interface to the PA amplifier. The audio out from this
line can be routed through a filter and volume control to plug J15,
Audio
Out2
by setting jumper S18 to ON.
It is possible to connect an intercom station to the same line (line
connection point 8) for use as a PA announcement monitor.
NOTE!
Do NOT connect an amplifier to line point 8A/B as the
40 kHz signal carrier may seriously damage the equipment!
SPA-V2 does not have any dedicated input for ACM/AlphaCom audio.
Several solutions are possible where two alternatives are normally used.
Alternative 1
– connect to X11,
PABX
(or X12,
PABX with recall
if X11
is already used).
-
Used when ACM shall have lower priority than microphones.
-
Preferred solution for analogue ACM exchanges with one-way
audio announcements (AMC-M-A).
Alternative 2
– connect to X7,
Talk-Back
.
-
Normally not suited for ACM-M-A-V2 unless if ACM must have
highest priority.
-
Preferred solution for digital ACM exchanges with two-way audio.
3.7.1 PA
amplifier
with
chime, without monitor
z
Connect a screened, twisted pair cable between pins 2/3 on terminal
J15,
‘Out2 Audio’
on the LCM unit and pins 1/2 on terminal X11,
(X12) on the SPA-TERM board which is connected to the CALL input
in the PA amplifier. Connect the cable screen to system ground.
z
Connect cables between terminals 1K+/1K- on the LCM unit and pin
3/4 on terminal X11 (X12) on the SPA-TERM board which is
connected to the PRIORITY terminal in the PA amplifier.
This will establish a chime signal in front of a call. The CHIME switch
in the PA amp. must be
ON
.
z
Set switch S18 to
ON
to activate the audio filter
Figure 10 RCO connection
Figure 11 PA interface connection
1A
2A
1B
2B
1C
2C
1D
2D
RCO 6
RCO 5
RCO 3
RCO 4
RCO 2
RCO 1 PA
1 REL
AY
O
U
TPU
TS 6
1K+
K+
K+
1K-
K-
K-
2K+
2K-
3K+
3K-
4K+
4K-
5K+
5K-
6K+
6K-
S6
S5
S4
S3
S2
S1
Po
t.f
ree
24
V
Pot
.fre
e
24
V
RCO - Li
ne Ca
rd 1
+ 24 VDC
0 V
<30 VDC / 250 VAC, max.5 A
ACM-E7
RCO 1-6
Max. load 1 A
X11
1
2
3
4
5
6
7
8
9
10
11
12
1
2
3
4
5
6
1
6
7
12
13
18
19
24
25
30
31
36
RP3
OUT2
Audio
ON
OFF
S10
S9
S18
S7
S8
S17
OUT2
Audio
A
K1+/K1-
B
C
D
PA monitor
S1
RCO1
Pot. free
SPA
Audio
in
Switch
PABX
3
2
1
