Dry Contacts - Delta RPI M6A Installation And Operation Manual

5 Planning the installation

5.10 Dry contacts

The inverter supports one multi-function relay which can be used
for external alarm devices like buzzers or strobe lights.
On the display (see "8.9 Dry contacts", p. 80), the dry contacts
can be connected to one of the following events:
Event Description
The functionality for dry contacts is
Disabled
switched off.
On Grid The inverter has connected to the grid.
Fan Fail The fans are defective.
Insulation Insulation test failed.
An error, fault, or warning message
Alarm
occurred.
Error An error message occurred.
Fault A fault message occurred.
Warning A warning message occurred.
Default setting for both dry contacts is "Disabled".
Cable and wire requirements
● Twisted and shielded cable (CAT5 or CAT6) with 2 wires
● Cable diameter: 5 mm
● Wire cross section: 1 mm
● The RS485 cables should be kept separate from the AC
cable and the DC cables to avoid interferences
Providing 12 V supply power for an external alarm device
DC
Depending on the type of communication card, the inverter pro-
vides one or two sources of on-board 12 V
Source of Supply
supply power voltage
Communication
a) 12 V
card
b) RS485 card 12 V
1) not recommend as it is more complicated than variant a)
Check the type of communication card installed in your inverter
before you plan how to connect dry contacts and digital inputs.
32
2
power supplies.
DC
Communication card
Type 1 Type 2
not possible
DC
x
DC
Fig. 5.17: Communication card type 1
Fig. 5.18: Communication card type 2
x
x
1)
Installation and Operation Manual for RPI M6A M8A M10A inverters V1.0 2016-02-03
Dry contacts
Digital inputs and
External Power Off
Dry contacts
VCC
GND
Digital inputs and
External Power Off