Networks; General Information; Point-To-Point Connection - Honeywell RM640 Handbook

ELECTRICAL CONNECTIONS
4

4.7 Networks

4.7.1 General information

The device uses the HART® communication protocol. This protocol agrees with the HART®
Communication Foundation standard. The device can be connected point-to-point. It can also
have a polling address of 1 to 63 in a multi-drop network.
The device output is factory-set to communicate point-to-point. To change the communication
mode from point-to-point

4.7.2 Point-to-point connection

Figure 4-8: Point-to-point connection (non-Ex)
1 Address of the device (0 for point-to-point connection)
2 4...20 mA + HART®
3 Resistor for HART® communication (typically 250 ohms)
4 Power supply
5 HART® converter
6 HART® communication software
54
point-to-point to multi-drop multi-drop, refer to
point-to-point point-to-point multi-drop multi-drop
HART
® network configuration on page 104.
www.honeywellprocess.com
RM640
34-VF-25-131 iss.1 GLO Feb 2019 US