4
795-20
To Emitters on
ZONE 3
Components
To Emitters on
Additional
COMMON
SOURCE
Components
COMMON EMITTERS
ZONE EMITTERS
A
B
A
B
A
B
A
B
+12V
ZONE 1 ZONE 2 ZONE 3
ZONE 4
ZONE IR INPUTS
ZONE 4
ZONE 3
ZONE 2
ZONE 1
+12 IN G +12 IN G +12 IN G +12 IN G
POWER
10 9 8 7 6 5 4 3 2 1
795-20
FOUR ZONE AMPLIFIED CONNECTING BLOCK
White
Striped
Side
6015900
Cable
6015900
Cable
To
+12
&
G
at one of
IR Zone
Connections
on 795
to
power this
791
To
+12
&
G
at one of
IR Zone
Connections
on 795
to
power this
791
+ 1 2 V D C
G N D
EMITTERS
12 VDC
HIGH
OUT
S TAT U S
I R I N
IR
RCVR
791-
44
AMPLIFIED
CONNECTING BLOCK
+ 1 2 V D C
G N D
EMITTERS
12 VDC
HIGH
OUT
S TAT U S
I R I N
IR
RCVR
791-
44
AMPLIFIED
CONNECTING BLOCK
Fig. 4
Emitter Expansion - Common and Zone Ports
Emitter Expansion
1. Zone Output Ports. Since the 795-20 zone output ports (A and B) are parallel driven and have a 470-
Ohm resistor in series with each, you may expand up to four emitters simply by using two dual emitters,
such as the 284M or the 286M.
To expand beyond 4 emitters, connect a 791-44 Amplified Connecting Block at the "A" or "B" port. This
makes a total of 11 ports available for that particular zone. See example in
Fig. 4
.
2. Common Output Ports. If more than 10 common emitter ports are needed, you may use any one of
the common ports to drive the input of a 791-44 Amplified Connecting Block. This will give you a total
of 19 common ports. See
Fig. 4.
3. When using 791-44 Amplified Connecting Blocks for emitter expansion, you may power them from the
+12V and G terminals on any one of the 795-20 IR ZONE terminals. See
Fig 3
. Be sure to take the
current drain of the 791's into consideration (13 mA each) and the extra emitters you use, when
calculating the total current for choice of power supply.
PLEASE NOTE:
Be sure that the 781RG and 782-00 Power Supplies, where used, are plugged into
unswitched AC outlets. This maintains the system in "standby" operation so that power ON commands can
be sent to the controlled equipment.
MOUNTING
The 795-20 can be conveniently mounted to a wall or shelf by using the four sheet-metal screws and the
two right-angle brackets supplied. Fasten a bracket to each end surface of the 795 using the two small black
screws, driving them into the holes provided. Use the longer screws to attach the unit to a wall or shelf. The
holes in the ends are located so that two different mounting positions are possible. The unit may be mounted
in any orientation to accommodate the installation.
9-29-00
