TECO-Westinghouse EQ7 Series, Инструкция по эксплуатации

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2-23
Table 2.7 Symbols, Names and Functions of the Control Circuit Terminals (Continued)
Cla
s
s
ifi
-
c
a
ti
o
n
Symbol Name Functions
T
ra
n
s
is
to
r o
u
tp
u
t
[Y1]
Transistor
output 1 (1) Various signals such as inverter running, speed/freq. arrival and overload early warning can
be assigned to any terminals, [Y1] to [Y4] by setting function code E20 to E24. Refer to
Chapter 4, Section 4.2 "Details of Function Codes" for details.
(2) Switches the logic value (1/0) for ON/OFF of the terminals between [Y1] to [Y4], and [CMY].
If the logic value for ON between [Y1] to [Y4] and [CMY] is 1 in the normal logic system, for
example, OFF is 1 in the negative logic system and vice versa.
[Y2]
Transistor
output 2
[Y3]
Transistor
output 3 (Transistor output circuit specification)
Photocoupler
<Control circuit>
[Y1]
to
[Y4]
[CMY]
31 to 35 V
V
o
lt
a
g
e
Current
Figure 2.16 Transistor Output Circuit
Item Max.
Operation
voltage
ON level 2 V
OFF level 27 V
Maximum current at ON 50 mA
Leakage current at OFF 0.1 mA
Figure 2.17 shows examples of connection between the control circuit and a PLC.
[Y4]
Transistor
output 4
- When a transistor output drives a control relay, connect a surge-absorbing diode
across relay’s coil terminals.
- When any equipment or device connected to the transistor output needs to be
supplied with DC power, feed the power (+24 VDC: allowable range: +22 to +27 VDC,
100 mA max.) through the [PLC] terminal. Short-circuit between the terminals [CMY]
and [CM] in this case.
[CMY]
Transistor
output
common Common terminal for transistor output signals
This terminal is electrically isolated from terminals [CM] and [11]s.

Connecting programmable logic controller (PLC) to terminal [Y1], [Y2], [Y3] or [Y4]
Figure 2.17 shows two examples of circuit connection between the transistor output of the inverter’s control
circuit and a PLC. In example (a), the input circuit of the PLC serves as a SINK for the control circuit output,
whereas in example (b), it serves as a SOURCE for the output.
C0
+
2
4
V
D
C
Programmable
logic controller
SINK input
Photocoupler
<Control circuit>
[Y1]
to
[Y4]
[CMY]
31 to
35 V
Current
C0
Programmable
logic controller
SOURCE input
+
2
4
V
D
C
Photocoupler
<Control circuit>
[Y1]
to
[Y4]
[CMY]
31 to
35 V
Current
(a) PLC serving as SINK (b) PLC serving as SOURCE
Figure 2.17 Connecting PLC to Control Circuit
Rel
a
y
o
u
tp
u
t
[Y5A/C]
General
purpose relay
output (1) A general-purpose relay contact output usable as well as the function of the transistor output
terminal [Y1], [Y2], [Y3] or [Y4].
Contact rating: 250 VAC 0.3 A, cos

= 0.3, 48 VDC, 0.5 A
(2) Switching of the normal/negative logic output is applicable to the following two contact
output modes: "Active ON" (Terminals [Y5A] and [Y5C] are closed (excited) if the signal is
active.) and "Active OFF" (Terminals [Y5A] and [Y5C] are opened (non-excited) if the signal
is active while they are normally closed.).