Precautions; Installation - AKG AS8 Manual

1.1. Precautions

1. Spill no liquids on the unit and do not drop any objects through the top panel ventilation slots.
2. Do not place the unit near heat sources such as radiators or air ducts, or in a place exposed to
direct sunlight, excessive dust, moisture, rain, mechanical vibrations, or shock.

2. Installation

Installing the AS8 properly is simple, and only requires attention to a few issues. The AS8 should be
used in a grounded metal rack. If only one AS8 is being used, it should be placed in the Master
mode , using the rear panel switch. Erratic performance will result if the unit is in the Slave mode ,
but no damage will be done to the unit. Proper operation will be restored when the unit is switched
to the Master mode. If multiple AS8s are used together, the first AS8 (i.e. the one with Expansion In
port used but not the Expansion Out port ) should be switched to the Master mode, while all other
AS8s should be in the Slave mode. Figure 2 shows the correct interconnection for multiple AS8s.
Figure 2 - Interconnection for multiple AS8s
PWR
EXPANSION
IN
M
A S
(CH40)
L
S
A
T
OUT
E V
20 VAC
R E
Switch in
MASTER Position
PWR
EXPANSION
IN
M
S
A
(CH40)
L
S
T A
OUT
E V
20 VAC
R E
Switch in
SLAVE Position
PWR
EXPANSION
IN
M
S
A
(CH40)
S L
A
T
OUT
E V
20 VAC
E
R
Switch in
SLAVE Position
RS232
IN
Master
RS232
IN
Slave
RS232
IN
Slave
26
AS8/AS8TC