Hach AS950 Grundlegende Installation Und Wartung Seite 17

1. Connect one end of the cable to the flow meter. Refer to the flow meter documentation.
2. Connect the other end of the cable to the AUX I/O port on the controller.
5.4.4 Connect a non-Hach flow meter
To connect a non-Hach flow meter to the AUX I/O port, do the steps that follow.
Items to collect: Multi-purpose auxiliary half cable, 7 pin
1. Connect one end of the cable to the AUX I/O port on the controller.
2. Connect the other end of the cable to the flow meter. Refer to
Note: In some installations, it is necessary to connect external equipment to the Pulse input, Special output
and/or Program Complete output with long cables. Since these are ground-referenced pulse interfaces, false
signaling can be caused by transient ground differences between each end of the cable. High ground
differentials are typical in heavy industrial environments. In such environments, it may be necessary to use
third-party galvanic isolators (e.g., optocouplers) in line with the affected signal(s). For the Analog input,
external ground isolation is typically not necessary because the 4–20 mA transmitter typically supplies isolation.
Figure 11 Auxiliary connector
Pin Signal Color
1 +12 VDC White
power
output
2 Common Blue
4
The wire color refers to the colors of multi-purpose cables (8528500 and 8528501).
5
All mains powered equipment that connects to the controller terminals must be NRTL listed.
Table 1 Half cable wiring information
4
Description
Power supply positive output.
Only use with pin 2.
Negative return of power
supply. When the power
supply is used, pin 2 is
connected to earth ground
Figure 11 and
Rating
Battery power to the I/O module:
12 VDC nominal; Power supply to the
I/O module: 15 at 1.0 A maximum.
5
.
Table 1.
English 17