Hach SC1500 User Manual page 19

3.2.5 Connect the analog/digital inputs
Electrocution hazard. Always remove power to the instrument before making electrical
connections.
If the instrument has the optional input card, the instrument has four 4–20 mA inputs. Such inputs are
commonly used for looping in external devices' analog or digital signals.
Connect each external device to an input as necessary. Refer to
the mobile application to configure each of the inputs to agree with a measured parameter (e.g. flow).
Make connections with twisted-pair shielded wire and connect the shield to the shield terminal.
• 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.
Notes:
• The input terminals accept 15 to 26 AWG wire.
• The inputs are isolated from the other electronics, but are not isolated from each other.
Figure 9 Connect the inputs
1 Wiring information—inputs
2 Input card
For wiring information, refer to the SC1000 user manual, section 3.6.2 Input Card Connections.
3.2.6 Install the Profibus DP card
Refer to the applicable probe manual for operating instructions and instrument profiles. Refer to the
company web site for the latest GSD files and documentation.
To connect the Profibus DP card to the SC controller, refer to the SC controller Profibus
DP/V1 network card documentation. Install the Profibus card. Refer to
After the plug-in expansion card is installed and connected, configure the card. Refer to the
documentation supplied with the Profibus DP card.
D A N G E R
Figure 9
3 Input terminal
to connect the inputs. Use
Figure 10 and Table 6.
English 19