Control Circuit Terminals - INVT SPC Series Operation Manual

SPC Series Solar Pump Inverter
Terminal
PV+, PV-
U, V, W

3.2.2 Control circuit terminals

Category
Power supply
S terminal
control power
supply
Digital input
Communication
Relay output
Name
PV DC input
Inverter output
Safety protection
grounding
Terminal
24V 24V power supply
COM Common terminal
PW S terminal switchover
S1 Start/stop control
RS485+
RS485 communication
RS485-
ROA NO contact of relay 1
ROB NC contact of relay 1
Common terminal of
ROC
PV module input terminals.
3PH AC output terminals, which connect to the water
pump motor in most cases.
Grounding terminal for safe protection; each machine
must be properly grounded.
Name
relay 1
-12-
Installation guidelines
Description
Description
Used to externally
24V± 10% power supply. Max.
output current: 200mA
Generally used
working power supply of digital
input/output or
sensor power supply
When PW and 24V are short
circuited, S terminals use the
PNP connection method.
When PW and COM are short
circuited, S terminals use the
NPN connection method.
Terminal specifications:
1. Internal impedance: 3.3kΩ
2. 12–24V voltage
acceptable
3. Max. input frequency: 1kHz
RS485 communication terminals,
using the Modbus protocol
Contact capacity: 3A/AC250V,
1A/DC30V
provide
as the the
the external
input is