4
ELECTRICAL CONNECTIONS
54
OPTIFLEX 1300 C
www.krohne.com
01/2008 • 4000172301 - HB OPTIFLEX 1300 R02 en
4.5 Networks
4.5.1 General information
The instrument uses the HART
®
communication protocol in networks. This protocol agrees with
the HART
®
Communication Foundation standard. The instrument operates in either point-to-
point or multi-drop networks of up to 15 instruments.
Output 1 is factory-set to communicate in point-to-point networks. Also refer to
Network
configuration
on page 86 for the procedure to change the communication mode from point-to-
point-to-
point-to-
point-to-
point
point
point
point to multi-drop
multi-drop
multi-drop
multi-drop.
4.5.2 Point-to-point networks
Figure 4-7:
Point-to-point connection (non-Ex)
1
Address of the instrument (0 for a point-to-point connection)
2
4...20 mA + HART
®
3
Resistor for HART
®
communication
4
Power supply
5
HART
®
modem
6
HART
®
communication device
-
+
1
2
4
5
3
6
HB_OPTIFLEX1300_EN_D4_080428.book Page 54 Tuesday, April 29, 2008 2:47 PM