Mitsubishi MELSEC F FX-40DU-E Handy Manual page 17

2.
INSTALLATION, WIRING AND GENERAL SPECIFICATIONS
2 . 3
External I/O
The external
1 1 0
wiring incorporated in the FX-40DU-E is described below
The external I10 has
8
input points and
8
output points, and it can receive inputs from external keys
and switches and drive external loads such as lamps and relays. It is connected to external equipment
by means of a connector.
Arrangement of external 110 connector pins (connector at FX-40DU-E side)
INPUT
0
rn
COM
COM
I7 I6 I5 I4 I3 I2 I1 I0
0 0 0 0 0 0 0 0 0 0 0 0
24 23 22 21 20 19 18 17
16
15
14
13
24+ 2 4 1
07
0 6
05
0 4
0 3 0 2 01 0 0
OUTPUT
Wiring example (110)
INPUT
24t
T
*
The two COM terminals are connected
internally.
All outputs are provided with a
surge absorber.
The two 24 (+)
terminals are connected
internally.
1
I
I
I
OUTPUT
lnput specifications
lnput connector
When one of the input terminals is short circuited to the [COM] terminal by a no-voltage contact or
NPN open collector transistor, input at that terminal is ON.
lnput circuit
The primary and secondary input circuits are insulated by photo-coupler and the secondary circuit is
provided with a C-R filter. Because of this, when an input changes from ON to OFF or from OFF to
ON, there is a response delay of approximately
4
ms in the FX-40DU-E. (The C-R filter serves to
prevent malfunction caused by chattering at the input contact or entry of noise from the input wire).
lnput sensitivity
The input current is
7
mAl24V DC, and the input sensitivity is 2.5 to
3
mA. However, in order to make
certain that an input comes ON the current must be
4.5
mA or greater and in order to make certain
that an input goes OFF the current must be
1.5
mA or less.
Consequently, if there is a diode or resistor in series with an input contact (meaning that it may not
come ON properly), or if there is a resistor or current leakage in parallel with an input contact (meaning
that it may not go OFF properly), the cautions on the following page must be observed.