Fuji Electric FRENIC-HVAC User Manual page 57

Symbol Name
 Connecting programmable logic controller (PLC) to terminal [Y1], [Y2], [Y3]
or [Y4]
Figure 2.9 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.
<Control circuit>
Photocoupler
Current
31 to
35 V
(a) PLC serving as SINK
[Y5A/C]
General-purpose
relay output
[30A/B/C] Alarm relay
output
(for any error)
Programmable
logic controller
[Y1]
SINK input
to
[Y4]
[CMY]
C0
Figure 2.9 Connecting PLC to Control Circuit
(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 φ = 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.).
(1) Outputs a contact signal (1C) when the protective function has
been activated to stop the motor.
Contact rating: 250 VAC, 0.3A, cos φ = 0.3, 48 VDC, 0.5A
(2) Any one of output signals assigned to terminals [Y1] to [Y4]
can also be assigned to this relay contact to use it for signal
output.
(3) Switching of the normal/negative logic output is applicable to
the following two contact output modes: "Active ON"
(Terminals [30A] and [30C] are closed (excited) if the signal is
active.) and "Active OFF" (Terminals [30A] and [30C] are
opened (non-excited) if the signal is active while they are
normally closed.).
2-24
Functions
<Control circuit>
Photocoupler
Current
[Y1]
to
[Y4]
31 to
35 V
[CMY]
(b) PLC serving as SOURCE
Related
function
codes
Programmable
logic controller
C0
SOURCE input