Dry Contact Connection - CanadianSolar CSI-75K-T40001-E User Manual

5.4.3.4 Connection Procedure (RJ45 network port)
Step 1: Loosen the swivel nut of the communication terminal and select an appropriate seal according to cable outer
diameter. Lead the cable through the swivel nut and seal successively.
Step 2: Strip the insulation layer of the Ethernet cable with a wire stripper, and insert the signal wires to the RJ45 connector.
Crimp the RJ45 connector with a crimping tool.
Step 3: Insert the RJ45 connector to the RJ45 jack.
Step 4: Pull the cable gently to make sure it is secured, tighten the swivel nut clockwise.

5.4.4 Dry Contact Connection

Dry Contact Function
Connection method of the dry contacts is similar to that of the RS485 terminal block.
DO terminal (fault output dry contact): the relay can be set to fault alarm output, and user can configure it to be a
normal open contact (COM＆NO).
The relay will trip to closed when a fault occurs. Use LED indicators or other equipment to indicate whether the inverter
is in the faulty state.
1) Free of fault, relay dose not trip. Circuit is disconnected and LED indicator is off;
2) Fault occurs, relay trips. Circuit is connected and LED indicator gets on.
Inverter interior
COM1 NO1 DI
DI terminal (emergency stop dry contact): the dry contact can be configured to be an emergency stop contact.
When the DI contact and +5V contact are shorted by external controlled switch, the inverter will immediately stop.
20 /41
Wire sequence and Function:
Pin1-White and orange
Pin2-Orange
Pin3-White and green(RS485- B)
Pin4-Blue
Pin5-White and blue
Pin6-Green (RS485+ A)
Pin7-White and brown
Pin8-Brown
Pin3 and Pin6 are used for
communication connection onl y.
FIG 5-10 Connection Procedure (RJ45 network port)
Free of fault,
relay does not trip.
Circuit is disconnected,
and LED indicator is
+5V
off.
FIG 5-11 Dry Contact DO terminal diagram
Inverter interior
COM1 NO1 DI
5 Electrical Connection
For cable gland
M20
3-4
N.m
Fault occurs,
relay trips.
Circuit is connected,
and LED indicator
+5V
gets on.