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8.- SIGNAL INPUT PARAMETERS
Hysteresis
0
Logic level 0
Logic level 1
1
Usually the signals to be counted or to be used as signal controls are
produced by electronic devices such as proximity switches, photocells,
pulse generators or mechanical closures.
The electronic sensors type NPN, PNP or NAMUR can be used if the
minimum output level is not lower than the indicated on the table below.
NOTE :
The signal level supplied by NAMUR sensors depends on the
air gap between the sensor and the metal, therefore it is recommended
to measure the real level logic 1 (ON) and level logic 0 (OFF).
K J H G F E D C B A
S1
S2
CONTROL BOARD
FREQUENCY
INPUT
CHANNEL 1 CHANNEL 2
To 100 Hz Jumper
J
Closed
Jumper
K
Closed
To 10 KHz
Jumper
J
Opened
Jumper
K
Opened
TABLE 2
TABLE 1
If a sensor type NAMUR is used , then the same type
must be used for both Channels.
The unit is provided with damping capacitors for switch
contact debounce. Limits count frequency to 100 Hz.
maximum and input pulse widths to 5 msc. minimum.
To obtain a good protection select the adequate jumpers
as indicated on the table above.
TABLE 3
Logic level 1
> 3.75 Vdc.
> 7.5Vdc.
Logic level 0
< 1.5 Vdc.
< 5.5 Vdc.
Jumper
H Closed (Channel 1)
H Opened (Channel 1)
G Closed (Channel 2) G Opened (Channel 2)
INPUT TRIGGER SELECTION
COUNT FREQUENCY SELECTION
SENSOR TYPE SELECTION
SENSOR
CLOSE JUMPERS
TYPE
CHANNEL 1 CHANNEL 2
PICK-UP
E No available
NAMUR
B - D - F
C
NPN
A - D - F
A
PNP
A - B - D - F
A - C
Mechanical closure
A - D - F
A