User Manual
EM303B General Purpose Inverter
100
EM303B provides 3 programmable output terminals including 2 multi-function output
terminals and 1 relay output terminal. There are 0
~
32 program codes. User can define
output variables of terminals.
2 multi-function output terminals are in OC output mode. Output common port is connected
to COM. When selected program code is enabled, the electronic switch is ON, and when it
is disabled, the electronic switch is OFF. OC can be powered either internally or externally,
as shown in Figure 7-8(a) and 7-8(b) respectively. If it is externally powered, the voltage
range is required to be within 8~24V.
+5V
COM
EM303B
PLC
Y1.Y2
+24V
24V
Relay
+5V
COM
EM303B
PLC
Y1.Y2
+24V
24V
Relay
+
-
DC
(
a
)
Internal Power supply
(
b
)
External Power supply
Figure 7-8 Power Supply Modes of Programmable Terminals
Relay output is provided by the internal relay of
inverter. Relay has 1 set of NO contacts and 1 set of
NC contacts.When the selected programmable code
is disabled, EB-EC is NC, and EA-EC is NO. When
the selected program code is enabled, the coil of
internal relay is power-on, EB-EC is off, and EA-EC
is on, as shown in Figure 7-9.
Function of Y1, Y2 and R1 can be defined by setting the value of F2-12~F2-14. See Table
7-3 for the functions of numeric multi-function output terminals.
Table 7-3 Functions of Numeric Multi-function Output Terminals
No.
Function
Description
0
Inverter Runs
(Enabled at Running)
When inverter is running, the output terminal is on.
1
Frequency Reach Range
FAR
(Enabled at running)
If |output frequency–setting input frequency|< the setting
value of F9-11, the output terminal is on. See 7.13.2 for
details.
2
Output Frequency
Detection Range
FDT1(Enabled at
running)
When inverter is running, if the output frequency increases
to the value of F9-12 (FDT1 Increasing Threshold), the
output terminal is on. If the output frequency drops and is
less than the value of F9-13 (FDT1 Decreasing Threshold),
the output terminal is off. See 7.13.3 for details.
3
Output Frequency
Detection Range FDT2
(Enabled at running)
When inverter is running, if the output frequency increases
to the value of F9-14 (FDT2 Increasing Threshold), the
output terminal is on. If the output frequency drops and is
less than the value of F9-15 (FDT2 Decreasing Threshold),
the output terminal is off. See 7.13.3 for details.
Figure7-9 Relay Contacts