Hach-Lange SI792 D, SI792x D, SI792x D-FF, SI792x D-PA User Manual - Manual (Page 25)

Installation
23
3.5.2 Power and communication connections
DANGER
Explosion hazard. The AC power source for the power supply unit
cannot exceed 250 VAC. Do not connect the transmitter directly to
an AC power source.
DANGER
Explosion hazard. The output voltage of the power supply unit
cannot exceed 30 VDC. The si792x transmitter must be connected
to an appropriately certified explosion-proof power supply unit.
Refer to "associated apparatus" in the control drawing or to the
EC-Type Examination Certificate for input ratings.
Prerequisites
• Trained personnel only must install or commission the
equipment.
• Follow the instructions in this user manual and the applicable
local and national codes.
• Observe the technical specifications and input ratings during
installation.
• Disconnect all power sources during wiring and installation.
• Use single wires/flexible leads up to 2.5 mm (AWG 14) for
connection to terminals.
• Do not damage the wire when stripping the insulation.
• All parameters must be set by a system administrator (Authority
Having Jurisdiction) before commissioning.