46
________________________________________________________________________________________________________________
5.1 Testing Using EXT I/O
________________________________________________________________________________________________________________
NOTE
5.1.5 Electrical Characteristics of the Output Signals
External DC
power supply
voltage
Output signals (internal pull-up resistors 4.7 k
Ω
)
High level
Low level
Output current
10 mA
Output current
40 mA
Output current
60 mA (max.)
5 V
5 V
0.9 V
1.1 V
1.2 V
12 V
12 V
0.9 V
1.1 V
1.2 V
24 V
24 V
0.9 V
1.1 V
1.2 V
The internal DC power supply of 5 VDC is provided between INT DCV and INT
GND. The maximum current capacity is 100 mA. Do not connect any external
circuit whose current consumption is greater than 100 mA.
INT GND is grounded to the chassis of the 3511-50 unit.
The output signal low level output current is a maximum of 60 mA. If a
current greater than this is required, you should connect a transistor circuit
using a current amplifier driven by an external power source or the like
externally.
The output signals are the collector outputs of the photocouplers, and are
connected to the external DC power supply (EXT DCV) via 4.7 k
Ω
pull-up
resistors provided internally to the 3511-50 unit.
The relationship between the external DC power supply voltage, the voltage
of the output signals, and the current, is as shown in the following table:
Direct connection of a circuit whose input voltage V
IL
is a maximum of 0.8
V or more is not possible.
In such a case, keep V
IL
below 0.8 V by incorporating a transistor or a drive
capable buffer circuit or the like.
Summary of Contents for 3511-50
Page 1: ...INSTRUCTION MANUAL For 3511 50 LCR HiTESTER...
Page 2: ......
Page 137: ......
Page 138: ......