
B–62073E/04
6. CONNECTION OF I/O UNITS TO
MACHINE INTERFACE
177
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)/Mt 1.3 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) / 2t 1.3 A
It 40 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
6.5.2
Output Signal
Regulations for the
Operator’s Panel
Connection Unit