AFP-400 Installation
PN 50253:A2 03/12/96
4-35
The ACT-1 connects to one of up to eight amplifiers on a given channel. Mul-
tiple ACT-1s are required for amplifiers on multiple channels.
Install an ACT-1 by following these steps:
1) Connect the low level audio loop to the terminal block on the ACT-1.
2) Connect the ACT-1 to the first amplifier in the chain.
Terminal Designation on the ACT-1
P8
AA-30/AA-120
ATG-2
AMG
Audio Out
amplifiers
8 7 6 5 4 3 2 1
S +
8
7
6
5
4
3
2
1
In (+)
In ()
Out (+)
Out ()
6
5
4
3
2
1
6
5
4
3
2
1
Alert (+)
Alert ()
Evac (+)
Evac ()
P1
+
Return
+
P4
Out
P4/P3
ATG-2 Low Level
in from AMG or
ATG-2
P3
Shield In
Shield Out
(through)
ATG-2 Low
Level
Output
AMG Polarity
ACT-1 Audio Coupling Transformer
Installation
8)
Com
7)
Earth
6)
S
5, 4) Thru
3)
S
2,1) Audio in
1) Using the supplied cable, connect the Earth ground terminal on each ACT-1
to P8 on the AA-120 or to a screw on the upper left corner of the AA-30. The
COMN terminal is intended for optional shielding of the secondary side of
the ACT-1 (low level audio from the ACT-1 through each amplifier). To use
shield, connect to the common of the local power supply but do not, at any
point, connect this shield to the shield from the primary side of the ACT-1.
2) Daisy chain the secondary side of the ACT-1 (low level audio) up to a
maximum of eight amplifiers.
3) Draw additional low-level audio risers (isolated from the main riser).
ACT-1 Connections
