®
3
Remote Control Switchers
Fig. 3
Location and Adjustment of Grounding Jumper
Jumper ON Position
(Common ground between G and Gs terminals)
IR Signal &
12VDC Terminals
PCB
+12 G Gs IR IN
Metal Chassis
Jumper OFF Position
(Isolated Grounds. No connection between the G and Gs terminals).
IR Signal &
12VDC Terminals
PCB
+12 G Gs IR IN
Metal Chassis
Refer to the RC68+ instructions for code group setting details and procedures
!
The code groups are identified by the numbers and letters that are on the face of each button.
NOTE: When shipped from the factory, the RT8 is set to code group number 58.
Be sure to set the RC68+ to the same number!
IR ROUTING MODES
The RT8 has the ability to direct IR control signals to any one of the 8 output ports, or all 8 as a group as
follows:
1. Single Routing
An IR route to a single port (1 through 8) occurs when a corresponding RC68+ Hand Held Programmer
code is sent. It remains on until a different routing command is sent (1 through 8) or when the GP-OFF
(group off) code is sent.
This allows any individually selected port to be driven with an IR control signal. The other seven will
be turned OFF.
2. GP-ON (Group On - all 8 ON as a group)
In this mode all 8 routes are chosen instantly with the GP-ON command. This is useful if you wish to
quickly address all groups at the same time.
3. GP-OFF (Group Off - all 8 OFF as a group)
After GP-ON is chosen, all 8 IR routes remain on until the GP-OFF command is sent
OR until an
individual route command is sent (1 through 8).
IR RCVR INPUT CONNECTOR
(refer to Figs. 1 & 3)
This 4-terminal input has electrical connections for +12V, G (chassis ground), Gs (IR signal ground) and
IR IN (IR signal). The Gs terminal is provided so that, if needed, the IR signal ground can be isolated from
the chassis ground. This isolation may be necessary in some instances to prevent ground loop problems,
etc.
A special jumper, within the RT8, gives you the option to make the grounds common or have them isolated.
Refer to Fig. 3.
To gain access to this jumper, remove the six screws that secure the top cover to the metal chassis.
Carefully lift the cover off. When you have made the
adjustment, reassemble in reverse order.
NOTE: When shipped from the factory, the jumper
is installed in the ON (common) position.
CAUTION: When powering IR receivers and key-
pads directly from the RT8, you
must leave the
jumper installed in the ON position so that the G
and Gs terminals are connected in common. This
provides the needed ground return for the IR signal.
Change the jumper to the OFF position only
when powering IR source devices separately
from the RT8 and there is a need for electrical
isolation.
RT8
