ONICON D-100 LonWorks - Manual (Page 7)

11451 Belcher Road South, Largo, FL 33773 • USA • Tel +1 (727) 447-6140 • Fax (727) 442-5699 • [email protected]
D-100-LON Network Interface Installation Guide 05/14 - 0658-4 / 18342
Page 7
1.4.2 Optional Network Interface With Isolated Digital Pulse Input (Di3)
The D-100 Display can be provided with an digital pulse input for totalizing pulse outputs
from external devices such as water or gas meters. Pulses are accumulated in an internal
register, and the totalized value is available on the network. This register can be zeroed via
the network. The maximum register total is 9,999,999. The register will rollover to zero
when this value is exceeded.
If the digital pulse input option was ordered at the same time the display was ordered,
it will arrive fully configured and ready to use. If it was ordered after the display was
delivered and is being installed as a field upgrade, it may be necessary to configure the
pulse input. The information is required to configure the input provided below and on the
following pages:
The input pulse must meet the following criteria:
1.
Frequency input range, 50 Hz maximum
2. 10 millisecond minimum pulse duration
Input Pulse Definition:
In order to configure the communications card digital pulse input, you must first
determine which type of pulse your meter produces. The allowable types of input
pulses are described on the following pages. Based on the type of pulse, set the selector
switch (S1) on the communications circuit board (Fig. 1) to the correct setting.
Fig. 1
DIGITAL PULSE INPUT (Di3)
CONNECTOR (T2)