36
4.2.2 USB card
a. CN2 is for USB connectors.
b. Compliant with USB 1.0 version, which transmission
rate can up to1.5Mbps.
c. Compliant with USB HID 1.0 (Human Interface Devices)
version.
d. Pin Definitions:
Fasten the 4 screws back to the
waterproof lid.
PIN1
：
VCC (+5V)
PIN2
：
D
－
PIN3
：
D
＋
PIN4
：
Ground
37
4.2.3 Relay Junction Card (DCE-B)
a. Pin definitions for the terminals:
1 2 3 4 5 6 7 8
PIN 1:
Utility voltage is too high or too low.
PIN 2:
The input voltage for the maximum power tracker A or B
is within the rated range.
PIN 3:
The input voltage for the maximum power tracker A or B
is too high or too low.
PIN 4:
The frequency of utility voltage is too high or too low.
PIN 5:
Islanding effect.
PIN 6:
A over current situation in the PV inverter.
PIN 7:
The heat sink temperature of the PV inverter is too high.
PIN 8:
Common point.
b. Contact capacity of each relay is 40dc/25mA.
c. JP1~5 is for selection of the relay contact action:
PIN 1&2 short-circuit is for N.C. action.
PIN 2&3 short-circuit is for N.O. action.
Summary of Contents for EnerSolis ES3000T
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