Fuji Electric FRENIC-VG Series - Page 107

6.2 PG Interface Expansion Card
6-31
Chap. 6
CONTROL OPTIONS
FRENIC-VG
OPC-VG1-PG(PR)
[PA]
[*PA]
[PB]
[*PB]
Main power supply
3-phase power
supply
50/60Hz
[SYC]
[CM]
Entry into
synchronized
operation
Pulse generator or
line driver PG
E
L1/R
L2/S
L3/T
MOTOR
U
V
W
M
[TH1]
[THC]
NTC thermistor
U
V
W
PG
[PGP]
[PGM]
[PA]
[PB]
SS,E
E
[FA]
[CM]
[FB]
Open collector
output
FRENIC-VG
OPC-VG1-PGo(PR)
[PA]
[PB]
Main power supply
3-phase power
supply
50/60Hz
[SYC]
[CM]
Entry into synchronized
operation
Master FRENIC-VG open
collector output
[FA]
[FB]
[CM]
L1/R
L2/S
L3/T
MOTOR
U
V
W
M
[TH1]
[THC]
NTC thermistor
U
V
W
PG
[PGP]
[PGM]
[PA]
[PB]
SS,E
E
E
[FA]
[CM]
[FB]
Open collector
output
[PGP]
[PGM]
5 V power
supply
5V
[PGM]
Zero-phase ferrite
ring ACL-40B x 1
(4 turns)
Position the zero-phase
ferrite ring as close to
the PGo card as
possible.
1500
1500
(1) Line driver output
The PG interface expansion card operates by
receiving pulse commands from an external
pulse generator or PG.
Since the FRENIC-VG receiving these
signals can generate open collector output
([FA] and [FB]), the pulse signals can be
passed to the next FRENIC-VG. In this way,
multiple FRENIC-VG units can be driven
synchronously.
(2) Open collector output
Open collector output can be used when
driving multiple FRENIC-VG units
synchronously. The open collector output
([FA] and [FB]) generated by the master
FRENIC-VG is connected to the slave
FRENIC-VG's PG interface expansion card.
The slave operates by receiving these pulse
commands.
Since the FRENIC-VG receiving these
signals can generate open collector output
([FA] and [FB]), the pulse signals can be
passed to the next FRENIC-VG. In this way,
multiple FRENIC-VG units can be driven
synchronously.
It is recommended to install a zero-phase
ferrite ring (ACL-40B) as shown in the figure
to the right in order to ensure a noise margin,
among other benefits.
Precautions
The OPC-VG1-PGo (open
collector type) is not suited to use
in applications characterized by a
challenging noise environment in
which signals are routed alongside
motor power lines or where wiring
is run over long distances,
reducing the noise margin.
In such applications, it is recommended to use the architecture shown in the figure to the right, which
utilizes the OPC-VG1-PG (line driver type).
Recommended insulation converter: SHC-205C05D (HEIDENHAIN Corporation)
Note: As a rule, shielded wires are earthed. However, if excessive induced noise from external sources
affects the system, the effects of such noise can be reduced by connecting shielded wires to 0 V.
Figure 6.2.20
Figure 6.2.19
Figure 6.2.21
【
】
A
A
B
B
COM
A
C 200/220V
Insulation
converter
Master FRENIC-VG
Open collecto
r
outpu
t
【
F
A
】
【
FB
】
【 】
Keep wiring as short as possible (SHC-205C05D)
【
PA
】
【
*
PA
】
【
PB
】
【
*
PB
】
OPC-VG1-PG (PR)
+
-
+
-
A
CPOWER
INPUT B INPUT A
OUTPUTB
OUTPUTA
CM
PGM