Working with the MPG-2ES (cont)
Bi-Directional Energy Flow (Signed Mode)
Because the MPG-2ES has only one pulse output, the bi-directional pulse mode will only give you output pulses for
positive energy flow. No pulses are outputted when there is negative energy flow. Therefore, Normal and Signed mode in
the MPG-2ES are essentially the same. The only option would be whether positive pulses are toggle or fixed as shown
below.
T1
Figure 4: 2-Wire (FORM A) FIXED Output Operation
K-Y Out
Open
Closed
KY closure time
In Signed mode, with a Form A output mode selected, the K-Y output pulse represents
positive (or kWh delivered) energy with a fixed width pulse; Negative (or kWh received)
energy is ignored.
(Positive)
Figure 3: 3-Wire (FORM C) TOGGLE Output Operation
K-Y Out
Open
Closed
Positive Energy Pulse Outputs Only
Positive and Negative Energy Pulse Outputs
In Signed mode, with a Form C output mode selected, the K-Y output pulses represent
positive (or kWh delivered) energy with a toggle pulse output; Negative (or kWh received)
energy is ignored.
Positive Flow
Positive Flow
Negative Flow
Positive Flow
Positive Flow
Negative Flow
