Hach-Lange SI792 D, SI792x D, SI792x D-FF, SI792x D-PA User Manual - Manual (Page 23)

Installation
21
3.5 Electrical installation
DANGER
Explosion hazard. Do not connect any components that are not
specified for the device. Always defer to the Hazardous Location
Control Drawing.
DANGER
Hamilton dissolved oxygen sensors are ATEX certified. The
combination of Hamilton dissolved oxygen sensors and the
si792 D transmitter are FM C1D1 certified. The Hamilton sensors
are not certified by CSA for use in Canadian hazardous locations.
See CSA control drawings for approved sensor options
Prerequisites:
• Review the applicable control drawing or ATEX certificate
• Review the electrical code regulations
• Review the regulations for electrical installations in hazardous
locations as needed (e.g. EN 60079-10/EN60079-14; 94/9/EC
directive; NEC; CEC; Profibus Technical Guidelines 2.091).
• Remove power or confirm non-hazardous status before making
any connections
• Confirm that the intrinsic safety of the device is maintained when
connected to other equipment such as a power supply unit.
3.5.1 Wire preparation
To remove the terminal blocks from the transmitter for sensor wiring:
1. Insert a flat screwdriver between the terminal block and the
transmitter body.
2. Use the screwdriver as a lever to lift the terminal block off the
connectors (see Figure 3 on page 22 ).