Connection Terminals - Hengstler signo 721 Benutzerhandbuch

Continuous pulses will be counted internally without loss.
The display shows the current count when the input is left open or
when low potential is fed to terminal 13.
Note
Set switches 2 and 3 to ON alternatively, otherwise the
counter may assume an undefined state!
Switch 4
Counting frequency (Input 5 kHz/30 Hz)
With this input the count input (terminal 11) can be set to
• either triggering with an electronic pulse generator at a max.
frequency of up to 5 kHz or
• triggering with a mechanical pulse generator at a max. frequency
of up to 30 Hz.
Switch 5
Locking the keypad reset (Key-Reset Lock/On)
In switch position
• "Key-Reset Lock" the counter reset routine via keypad is
disabled.
• "On"the counter can be reset via keypad.
Switches 6, 7
Locking the keypad (Key l 2 Off/On, Key l 1 Off/On)
• preset P
• the correction value and
• the prescaler value
can, depending on the positions of these two switches, be locked or
released by feeding an active level to the keylock input (terminal 14).
The table shows various options, the corresponding switch positions
and the required potential at the keylock input.
Switch Input
Key|1 Key|2 Keylock P COR PSC
OFF OFF Low A A
OFF OFF High A A
ON OFF Low A –
ON OFF High L A
OFF ON Low A –
OFF ON High A –
ON ON Low A –
ON ON High L –
A modifiable, L not modifiable, –
Switch 8
Automatic reset
(Auto-Reset On/Off)
In switch position
• "Auto-Reset On" the counter
is set/reset automatically when
a defined counter value (0 or
preset value P) has been
reached.
• Automatic setting/resetting is carried out without pulse loss up to
the max. pulse frequency (5 kHz) – independent of the signal dura-
tion set at the potentiometer.
• In OFF position the counter will not be set/reset automatically.
(Whether the counter is set or reset depends on the position of
switch 9.)
Sach-Nr. 2 721 091; Version 1250100MW
P2
• presets P1 and P2
• the correction value and
• the prescaler value
P2
Keys Keys
P1 P2 COR PSC
A A A A
L L A A
A A A –
L L L A
L A A –
L L A –
L A A –
L L L –
no display indication
P2
In switch position
• "Auto-Reset On" the
counter is set/reset auto-
matically when a defined
counter value (0 or preset
value P2) has been reached.
Switch 9
Reset/set (Reset/Set)
The switch position "Reset" defines that any count is reset to 0 by a
• keypad reset 1)
• auto reset 2) or
• external reset 4 )
Output OUT responds when preset value P has been reached.
The switch position "Set" defines that any count is set to preset
value P by a
• keypad reset 1)
• auto reset 3) or
• external reset 4)
Output OUT responds when 0 has been reached.
P2
The switch position "Reset" defines that any count is reset to 0 by a
• keypad reset 1)
• auto reset 2) or
• external reset 4)
Output OUT responds when preset value P2 has been reached
The switch position "Set" defines that any count is set to preset
value P2 by a
• keypad reset 1)
• auto reset 3) or
• external reset 4)
Output OUT responds when 0 has been reached
1) Keypad reset by pressing keys
2) Auto reset when preset value P (P2) is reached if operating mode
is set to automatic repetition (switch 8).
3) Auto reset when 0 is reached if operating mode is set to automatic
repetition (switch 8).
4) High potential fed to Reset input (terminal 12).
Potentiometer – signal duration
Output OUT can be set to monostable
or bistable status by adjusting the
A
potentiometer.
L
A
L
The mono time can be set between approx. 0.05 s and approx. 1 s.
L
When turned clockwise all the way, the output changes to bistable
L
status when the corresponding preset value has been reached.
L
L
4.4

Connection terminals

Fig. 4-2 Connection terminals 1-16
and R simultaneously.
P2
Output OUT2 can be set to
monostable or bistable
status by adjusting the
potentiometer.
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