
6. CONNECTION OF I/O UNITS TO
MACHINE INTERFACE
B–63323EN/03
204
The output signals from the operator’s panel connection unit are used for
driving lamps and light emitting diodes on the machine operator’s panel.
An NPN transistor is used as a driver. The output type is direct current
output signal B.
(1) Direct current output signal B
The direct current output signal B is used for driving relays and light
emitting diodes for indication on the machine. A transistor is used as
a driver.
(a) Ratings of the output transistor
(i) Maximum load current when output is ON: 200 mA (including
momentary load)
(ii)Saturation voltage when output is ON: 1.6 V (maximum)/1.0 V
(normal) (when load current is 200 mA)
The maximum load current is limited to 1.3 A per common wire
(Note).
NOTE
Although a maximum load current of 200 mA is permitted
when the output is ON, the load current allowed to flow
through a common wire is limited to 1.3 A. Therefore, the
load current of the output transistor must satisfy the
following condition:
(N × I)/Mt1.3 A
Where N = Number of DO points that can be turned on
simultaneously
I = Load current that flows when output is ON
M = Number of common wires (one or two)
Example:When there are 64 DO points that can be turned on
simultaneously and two common wires are used, the rated load
current is 40 mA, calculated as shown below:
(64 × I) / 2t1.3 A
It40 mA
(iii)Withstand voltage when the output is off: 24 V + 20% or less
including an instantaneous value
(iv)Leakage current when the output is off: 100 mA or less
6.9.2
Output Signal
Regulations for the
Operator’s Panel
Connection Unit