ONICON D-100 Flow - Manual (Page 19)

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D-100 Flow Display Manual 10/14 - 0634-14 / 18340 Page 19
3.3.2 Frequency / Pulse Flow Input (Di2)
The D-100 is provided with a separate input for frequency or scaled pulse flow signals,
(T4, terminals 6 and 7). This input can be configured to accept an active, positive going
pulse (5-24 VDC) output signal, an open collector output signal or a contact closure (dry
contact) output. The maximum input frequency is 500 Hz. Contact ONICON for technical
assistance in configuring and programming this input. When this flow input is used the
display menu pages will indicate Di2 on the rate and total(s) pages.
T3
1
2
3
4
5
T4
1
2
3
4
5
6
7
8
9
10
11
12
13
T5
1
2
3
4
5
6
ANALOG INPUTS
SIGNAL
REFERENCE
SIGNAL
REFERENCE
SHIELDS
24 VCD SUPPLY +
SUPPLY COMMON -
SHIELD
4-20 mA +
4-20 mA -
FREQUENCY +
FREQUENCY -
DIRECTION +
DIRECTION -
ALARM +
ALARM -
TOP TURBINE
BOTTOM TURBINE
4-20 mA +
0-10 VDC +
ANALOG COMMON -
ISOLATED ANALOG COMMON -
SCALED +
SCALED -
FLOW METER INPUTS
AUXILIARY FLOW METER SIGNALS
Ai4
Ai3
Ai2
Di2
3.3.3 Analog Flow Input (Ai2)
The D-100 is provided with a separate input for analog
flow signals (T4 terminals 4 and 5). This input can be
configured to accept active or passive (loop powered)
4-20 mA signals. Contact ONICON for technical
assistance in configuring and programming this input.
When this flow input is used the display menu pages will
indicate Ai2 on the rate and total(s) pages.
3.3.4 Directional Contacts
The D-100 is provided with a separate input for
determining flow direction. Connections for this input
are made at T4 terminals 8 (+) and 9 (-). This input can be
connected to a non- polarized contact closure relay or an
open connector output. Note that the input is polarized
for sinking (NPN) open collector outputs. Totals will
accumulate in the (+) Mode 1 registers whenever the
contacts are closed.
3.3.5 Ai3 and Ai4 Analog Inputs
The D-100 can be provided with two optional analog
inputs capable of powering any standard 4-20mA loop
powered sensor. The inputs can also be configured
from the factory to accept an active (powered) 4-20mA
signal. Rate data from the two sensors is available via the
network interface and the analog 4-20mA signals can be
replicated via the optional multi-analog output board.
Analog input Ai3 is connected to T3 terminals 1 (+) and
2 (-). Analog input Ai4 is connected to T3 terminals 3 (+)
and 4 (-). Do not exceed 4.5 in-lb (0.5 Nm) of torque,
when tightening the terminals.
3.3.6 Digital Pulse Input (Di3)
The D-100 can be provided with an optional digital pulse input. This option is only
available on displays provided with serial communications. It allows the D-100 to receive
a pulse input from an external device such as a power meter or gas meter. The pulses are
totalized in an internal register and are available via the serial communications network.
This register can be zeroed on demand via the front panel or over the network. When this
pulse input is used the display menu page will indicate Di3 on the total page. Contact
ONICON for more information.