3.10 Control I/O Connections
78
YASKAWA ELECTRIC
SIEP C710616 27C YASKAWA AC Drive A1000 Technical Manual
◆
Using the Pulse Train Output
The pulse train output terminal MP can either supply power but can also be used with external power supply. Peripheral
devices should be connected in accordance with the specifications listed below. Failure to do so can cause unexpected
drive operation, and can damage the drive or connected circuits.
■
Using Power from the Pulse Output Terminal (Source Mode)
The high voltage level of the pulse output terminal depends on the load impedance.
Note:
The load resistance needed in order to get a certain high level voltage V
MP
can be calculated by:
Figure 3.33
Figure 3.29 Pulse Output Connection Using Internal Voltage Supply
■
Using External Power Supply (Sink Mode)
The high voltage level of the pulse output signal depends on the external voltage applied. The voltage must be between
12 and 15 Vdc. The load resistance must be adjusted so that the current is lower than 16 mA.
Figure 3.34
Figure 3.30 Pulse Output Connection Using External Voltage Supply
Sourcing Mode
Load Impedance R
L
(k
Ω
)
Output Voltage V
MP
(V) (insulated)
1.5 k
Ω
5 V
4 k
Ω
8 V
10 k
Ω
10 V
External Power Supply (V)
Load Impedance (k
Ω
)
12 to 15 Vdc
±
10%
1.0 k
Ω
or higher
Drive Internal Power Supply
External 24 Vdc Power Supply
24 Vdc
H1
H2
HC
Jumper S3
24 Vdc
H1
H2
HC
External
24 Vdc
Jumper S3
R
L
= V
MP
2 / (12 - V
MP
)
MP
AC
V
MP
R
L
Load Impedance
MP
AC
Load Impedance
Sink Current
External Power Supply
