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2.8 Paralleling Breakers
Breakers can be paralleled for higher current capacity:
• Only parallel two breakers with the same current rating.
• Wiring recommendation: Run two breakers wired together with matched impedance.
• Please note that the maximum current rating when two breakers are paralleled is
typically 180% of the single channel rating. (Example: 18A maximum for two 10A
breakers in parallel). This is because the impedance of the two paralleled breakers will
not be identical due to component variation.
• See tables below for recommended parallel breakers:
Paralleled Breakers
Breaker #7 (12A) & Breaker #4 (12A)
Breaker #9 (5A) & Breaker #6 (5A)
Breaker #6 (5A) & Breaker #12 (5A)
Breaker #3 (5A) & Breaker #12 (5A)
Breaker #5 (10A) & Breaker #8 (10A)
Breaker #2 (10A) & Breaker #8 (10A)
Breaker #2 (10A) & Breaker #10 (10A)
Breaker #1 (10A) & Breaker #10 (10A)
You can parallel two breakers by assigning the same switch group number to the two
breakers.
When you parallel breakers, configure the CLMD12 to assign 50% of the maximum current to
the Current Rating parameter for each of the two paralleled breakers. For example, if you
parallel Breaker #7 and Breaker #4 and wish to use them to supply power to a load rated at
22A, configure the Current Rating for each of the two breakers to 12A. This will result in a
typical maximum current rating of 22A for the paralleled breakers.
2.8.1 Discrete Inputs
The discrete inputs respond to three voltage level states, "Active High", "Open" and "Active
Low". That is, when the input is at V-Battery it will be read as a logic '1' or "High". When the
input is at 0 V or GND it will be read as logic '0' or "Low". The unused discrete inputs can be
left disconnected which results in an "open" state.
The following diagram shows the impedance model of the Discrete Input circuits.
Revision 1.6
Typical Maximum Current
22A
9A
9A
9A
18A
18A
18A
18A
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