ZEN-LOG-MAN-16V03 (0930)
Copyright © 2016 Define Instruments
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recommended to zero errors (see Note 2).
Note 4
All cables must be screened, with
screen earthed at one end only.
Note 5
When thermocouple inputs are se-
lected, an upscale resistor is automatically
connected to the T/C + input, resulting in
an overflow condition for open or broken
sensors.
Note 4
Do not run input cables in close
vicinity to noisy power supplies, contac-
tors or motor cables. The best practice is
to run input cables on a separate earthed
cable tray. This will minimise RFI effects,
of which magnitude cannot be easily
predicted.
7.5 - Digital pulse
Frequency range
0–2500.0Hz
Fast counter range
0–2500.0Hz
Sensors
Open collector (NPN, PNP), TTL
or Clean Contact
Frequency resolution
0.1Hz
Debounce counter range
0–50Hz max
Counter register output
32 bit
Accuracy
±0.5%
The Zen's 16 universal input terminals accept
digital inputs from NPN, PNP or TTL sensors
as well as Clean Contacts. Pulses up to 2.5kHz
can be counted (except for the debounced
counter, which has a range of 0–50Hz).
A variety of operating modes are software
programmable to suit your application.
Software programmable modes include:
›
General counter
›
General debounced counter (ideal for
mechanical relay contacts which are
subject to bouncing)
›
General frequency
›
Flow count (uses K-factor)
›
Flow rate (uses K-factor)
›
RPM (uses pulses per revolution)
NPN Open
Collector
Output
PNP Open
Collector
Output
TTL Input
Reed Switch or
Relay Contact
