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Instruction Booklet
IB 70-8698
Instruction Manual for the Eaton RTC-100
Automatic Transfer Switch Controller
eaton Corporation
www.eaton.com
Effective December 2009
Active Load Control.
4.1.4 RTC-100 on board Active Load Control
4.1.4.1 Connections
There are 2 relays on the RTC-100 that can be used to actively con-
trol up to 2 loads while connected to the generator source. The con-
nections are on J8 located on the top of the board. Pins 1 and 2 are
the primary load and pins 3 and 4 are the secondary load (see
Figure
5
). The primary load has priority over the secondary load.
The loads can be any load that provides a voltage to turn on (i.e.
Air Conditioner, hot tub, etc). The relays will function with a voltage
input as little as 12 Vac/Vdc up to 120 Vac/Vdc. Typical connection
scheme is shown in Figures 6 and 7. The connections must be such
that the grounded side of the voltage source MUST be connected to
pins 2 or 4. The “HIGH” or “HOT” side of the voltage source MUST
be connected to pins 1 or 3. If these connections are reversed, the
load will cycle rapidly rather than remain on.
Pin Locations:
4 3 2 1
Priority 2
Controlled Load
Priority 1
Controlled Load
Figure 5. Connections of Controlled Loads to J8 on RTC-100.
