6. Pulse output
The BA564G Counter has an opto-isolated solid state
pulse output. The output is an open collector having
the following electrical parameters:
Ron
=
60
+ 3V
Roff
=
1M
Imax
=
10mA
The output pulse may be a synchronous duplicate of
Input A or Input b for re-transmission applications, or it
may be derived from the total display. When derived
from the total display the output pulse frequency may
be divided and the output pulse width defined.
The retransmitted RTx annunciator on the instrument
display shows the status of the retransmitted pulse
output. Annunciator activation depends upon the
setting of
5ource
in the pulse output configuration
menu.
5caled:
Annunciator activated each time pulse output
open collector is
on
, i.e. Ron is less than 60
Ω
+ 3V.
direct:
Annunciator
continuously activated
6.1 System design
The Counter’s pulse output is a passive circuit i.e. not
powered, but it is totally isolated from all other
Counter circuits. The terminals P1 and P2 may be
connected to any other instrument with an open
collector pulse input.
Fig 9 shows how to produce a voltage pulse output
that could be used to drive a safe area counter. The
positive terminal of the pulse output circuit P1 is
connected to the Counter’s positive supply terminal 1.
When an output pulse occurs and the open collector
output ‘closes’, P2 is connected to P1 and the pulse
current flows through resistor R1. The current flowing
in the circuit is determined by R1 which should be
chosen to limit the pulse output current to less than
10mA. For a 24V supply R1 should be greater than
2,200
Ω
.
Fig 9 Generating voltage pulse output
6.2 Configuration
The pulse output is configured via the
PuL5E oP
sub-menu in the configuration menu as shown in
Fig 9.
This sub-menu allows the source of the output
pulse to be selected. For re-transmission
applications the output pulse may be a
synchronous duplicate of the pulse at Input A or at
Input b by selecting
dirECt A
or
dirECt b
in the
5ourCE
sub-function.
Selecting
5CALEd
derives the output pulse from the
total display and introduces two additional
functions,
diVidE
and
durAtion
to the sub-menu
allowing the output pulse frequency to be divided
and the output pulse width (duration) to be defined.
If the
diVidE
and
durAtion
functions are
configured such that the output pulse frequency
with the specified pulse width can not be output in
real time, the number of pulses will be stored and
transmitted at the maximum possible speed.
When the total display is reset to zero or the power
supply to the BA564G Counter is disconnected or
turned off, any stored pulses will not be retained
.
23
Summary of Contents for BA564G
Page 1: ...Issue 5 9th July 2019 BA564G Two Input General Purpose Counter Issue 5 ...
Page 14: ...14 ...
Page 15: ...15 ...
Page 37: ...37 ...