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Table 8 DIP switch settings for network address (continued)
Network address
Switch 1
Switch 2
18
Off
On
19
On
On
20
Off
Off
21
On
Off
22
Off
On
23
On
On
24
Off
Off
25
On
Off
26
Off
On
27
On
On
28
Off
Off
29
On
Off
30
Off
On
31
On
On
RS485 serial output with FXB protocol
Instruments with the RS485 FXB communication option use industry-
standard FXB protocol. Refer to the company website for FXB protocol
information.
Pulse communication
Instruments with the pulse communication option send an 8-µs pulse
signal when a particle is detected. Refer to
counter or data acquisition system receives the pulse signal and counts
the pulses as particles.
Instruments with pulse communication have two pulse output channels
(Ch 1 and Ch 2). Channel 1 sends a pulse signal when the Channel
Switch 3
Switch 4
Switch 5
Off
Off
On
Off
Off
On
On
Off
On
On
Off
On
On
Off
On
On
Off
On
Off
On
On
Off
On
On
Off
On
On
Off
On
On
On
On
On
On
On
On
On
On
On
On
On
On
Figure
14. An external pulse
1 particle size is detected. Channel 2 sends a pulse signal when the
channel size that is selected by the user is detected.
Pulse communication includes a status output signal that goes from low
to high when there is an active alarm. Pulse communication cannot be
used in a network configuration.
Set the network address for pulse communication instruments to 1.
Refer to
Table 8
on page 20.
The pulse signal can be sent in one of two count modes:
• Differential mode (default)—A signal is sent on Channel 1 when a
particle is between the first and the second channel size thresholds. A
signal is sent on the Channel 2 when a particle is larger than the user-
selected channel size threshold.
• Cumulative mode—A signal is sent on Channel 1 when a particle is
larger than the first or second channel size threshold. A signal is sent
on Channel 2 when a particle is larger than the user-selected channel
size threshold.
Figure 14 Differential versus cumulative count mode example
1 Pulse signal sent from counter
2 Data transfer in differential versus
cumulative mode
3 Channel 2
4 Channel 1
5 Differential count—one 0.3 µm and
two 5.0 µm particles
6 Cumulative count—three 0.3 µm
and two 5.0 µm particles
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