Hach IO9000, Инструкция пользователя

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Terminal connections to the mains circuit in permanent connection applications must have insulation
rated for a minimum of 300 V, 60 °C (140 °F). Terminals connected to the mains circuit with a power
cord connection must be double insulated and rated 300 V, 60 °C (140 °F) at both the inner and
outer insulation levels.
Table 1 Wiring—relays
NC COM NO
Normally closed Common Normally open
Connect the analog inputs
The I/O module has two analog inputs. Connect auxiliary instruments (e.g., third-party ultrasonic
sensor) to the analog inputs to supply measurements to the sampler. Refer to
Specifications
on page 3 for the analog input specifications.
Connect one auxiliary instrument to each analog input with 24 to 16 AWG wire. Use 19 AWG to
16 AWG wire instead if the wire is 7.62 m (25 ft) long or more. Refer to
Figure 4 on page 11, Figure 5
on page 12 and Table 2 to connect the analog inputs.
Make connections with twisted-pair shielded wire. Connect the shield to a stud on the conduit
backing plate or at the far end of the cable.
• Do not connect the shield at both ends of the cable.
• Use of non-shielded cable may result in radio frequency emission or susceptibility levels higher
than allowed.
Table 2 Wiring—analog inputs
Pin Description
IN # HI +
IN # LO –
Connect the analog outputs
The I/O module has three isolated 0–20 mA or 4–20 mA analog outputs. Configure the analog
outputs to supply a measurement from the sampler to an external instrument. Refer to
Specifications
on page 3 for the analog output specifications.
Refer to
Figure 6 and Figure 7 to connect the analog outputs. Refer to Figure 4 on page 11 and
Figure 5 on page 12 to make wiring connections. Make connections with twisted-pair shielded wire
and connect the shield to a ground stud on the conduit backing plate.
• Do not connect the shield at both ends of the cable.
• Use of non-shielded cable may result in radio frequency emission or susceptibility levels higher
than allowed.
Figure 6 I/O module-powered loop
1 Analog output 2 External device
English 13