20
Installation
3.6.4 RS232 wiring
Refer to Figure 12 and Table 3 to install a particle counter with RS232 communication.
3.6.5 Pulse wiring
Counters with the pulse output option send a pulse signal when a particle is detected. An
external pulse counter or data acquisition system counts the pulses as particles. Pulse
units have two output channels (Ch 1 and Ch 2). Channel 1 reads the smallest size
particles. Channel 2 can be set for a larger size using the setup utility program. The
status output, when asserted, indicates that the particle counter needs attention.
Pulse units cannot be used in a network configuration. The address must always be set
to 1 (Table 8 on page 33). Refer to Figure 13 and Table 4 to install a particle counter with
pulse output.
Figure 12 Terminal assignments—RS232 communication
Table 3 Terminal assignments—RS232 output
Terminal Assignment
1 (not used)
2 (not used)
3RS232 TX
4 RS232 RX
5NC
6Pump TD
7 Pump RD
8 Common (shield ground)
9 Power source (9–28 VDC, 1 A maximum)
10 Common
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