Precautionary Labels; Product Overview - Hach HART Manuel D'utilisation

Precautionary labels

Read all labels and tags attached to the instrument. Personal injury or
damage to the instrument could occur if not observed. A symbol on the
instrument is referenced in the manual with a precautionary statement.
This symbol, if noted on the instrument, references the instruction
manual for operation and/or safety information.
This symbol indicates that a risk of electrical shock and/or
electrocution exists.
This symbol indicates the presence of devices sensitive to Electro-
static Discharge (ESD) and indicates that care must be taken to
prevent damage with the equipment.
Electrical equipment marked with this symbol may not be disposed of
in European public disposal systems after 12 August of 2005. In
conformity with European local and national regulations (EU Directive
2002/96/EC), European electrical equipment users must now return
old or end-of-life equipment to the Producer for disposal at no charge
to the user.

Product overview

The HART module enables HART digital communication and gives two
HART connections to the controller. HART communication is an
industrial standard bidirectional digital communication over 4-20 mA
analog current loops. The module connects to the network card
connector inside the controller.
Three isolated analog outputs (output A – output C) are provided. Such
outputs are commonly used for analog signaling or to control other
external devices. Each output can be active through the use of internal
module power or external/loop power (requires an external VDC power
supply). When configured for HART communication, an external power
supply is recommended. For maximum loop resistance versus voltage
information, refer to Figure 1.
4 English
Figure 1 Loop load limitations
1 Loop load resistance (ohms)
2 HART operating region
3 Supply voltage (DC)