INVT SPC Series User Manual

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

INVT SPC Series Specifications

General

Brand	INVT
Model	SPC Series
Category	Inverter
Language	English