12
Quick installation guide for RPI M50A inverters
Connecting digital inputs, EPO and dry contacts (optional)
10
Digital inputs and EPO (Emergency Power Off)
When the fans fail,
Dry contact 1
is closed
When the inverter feeds into the grid,
Dry contact 2
is closed
The digital inputs can be used to connect an external ripple con-
trol receiver for controlling the active power
Dry contacts
DC 2
COMM.
+
–
Communication port
Pin
Designation
Short
Assigned action
1
V1
-
-
2
K0
V1 + K0
Emergency Power Off
3
K1
V1 + K1
Set maximum active
power to 0%
4
K2
V1 + K2
Set maximum active
power to 30%
5
K3
V1 + K3
Set maximum active
power to 60%
6
K4
V1 + K4
Set maximum active
power to 100%
7
K5
V1 + K5
Reserved
8
K6
V1 + K6
Reserved
1
2
3
4
5
6
7
8
Dry contact 2
Dry contact 1
EPO and digital inputs
VCC switch and RS485 termination resistor
Dry contacts
Interface for VCC and RS485
The relay for EPO can be set on the display to “normally open”
or “normally closed” (see
“Setting EPO (Emergency Power Off)”,
p 17
)
On the display (see
“Setting dry contacts”, p 17)
, the dry con-
tacts can be connected to one of the following events:
Event
Description
Disable
The functionality for dry contacts is
switched off
On Grid
The inverter has connected to the grid
Fan Fail
The fans are defective
Insulation
Insulation test failed
Alarm
An error, fault, or warning message
occurred
Error
An error message occurred
Fault
A fault message occured
Warning
A warning message occured
