User Manual
EM303B General Purpose Inverter
36
+3.3V
COM
EM303B
PLC
Y1.Y2
+24V
24V
Relay
+
-
DC
Figure 3-17-b Multi-function Terminal with External Power Supply
Remarks:
If the multi-function output terminal is powered by external supply, then the multi-function
input terminal should be applied with the same supply, to avoid short circuit when input
terminal is set as PNP mode.
3.3.7
Wiring Analog Output Terminals
Analog output terminals M0 and M1 can represent various physical quantities when
connected to external analog meter. The specifications of jumper are taken as: 0~20mA
output current or 0~10V output voltage. Here M0 and M1 correspond to JP1 and JP2
respectively. See Figure 3-18 for details.
GND
EM303B
M1
M0
Analog Meter
J1
M0: Analog voltage output
M0: Analog current output
J2
M1: Analog voltage output
M1: Analog current output
Figure 3-18 Wiring Analog Output Terminal
3.3.8
Wiring Communication Terminal
Terminals A+ and A- are the RS485 communication terminals of the inverter. The control
network between PC or PLC and inverter can be achieved through connecting
communication with PC or PLC. See Figure 3-19 and Figure 3-20 for connection of RS485,
RS485/RS232 converter and EM303B.
Connect to PC or PLC through RS485 terminal
A-
EM303B
A+
PE
PC/PLC
RS485
Communication
Terminals
485+
485-
GND
GND
Figure 3-19 Wiring Communication Terminals