PowerLogic PM820 - Chapter 5-Communications; Onboard Communications Capabilities

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63230-500-224A1 PowerLogic
®
Series 800 Power Meter
6/2006 Chapter 5—Communications
EN–35
ENGLISH
CHAPTER 5—COMMUNICATIONS
Onboard Communications Capabilities
Table 5 – 1: 2-wire, RS485 Port Capabilities
Communications Port
RS485:
• 2-wire with shield
• EIA compliant
• Allows the power meter to be
connected to a daisy-chain of up to 32
devices
Baud Rate
9600
19200
38400
Communications Distances See Table 5 – 2.
Protocols
Modbus RTU
Jbus
7-, 8-bit ASCII
Parity
ODD
EVEN
NONE
Table 5 – 2: 2-wire, RS485 Communications Distances
Baud Rate
Maximum Communication Distances
1 to 32 Devices
Feet Meters
9600 8,000 2,438
19200 6,000 1,829
38400 3,000 914
NOTES:
• Distances are for 2-wire devices and 4-wire devices configured for 2-wire operation,
such as the Series 600 Power Meter and the Series 3000 and 4000 Circuit Monitor.
• Distances listed should be used as a guide only and cannot be guaranteed for non-
POWERLOGIC devices. Refer to the master device’s documentation for any
additional distance limitations.