Specifications

Chapter 8 – PL Smart Transceiver Programming
210 PL 3120/PL 3150/ PL 3170 Power Line Smart Transceiver Data Boo
k
When power management is enabled, PL Smart Transceivers require a V
A
supply voltage of 13.0V before they
can be assured of transmitting a packet. A product with a fixed V
A
power supply less than or equal to 13.0V
should never have power management enabled because it might not be allowed to transmit. Likewise a device
whose power supply relies on power management to operate correctly should never have the power management
feature disabled. Table 8.1 summarizes these points.
Table 8.1 Power Management Requirements Vs. Type of Power Supply
Power Management
Fixed V
A
Power Supply ≤13.0V
Energy Storage V
A
Power Supply
>13.0V in Receive Mode
Disabled OK Not allowed if the power supply design
relies on power management for worst
case duty cycle and supply conditions.
Enabled
Not allowed:
device might not
transmit
OK
Note that some legacy network tools load a device's communication parameters as part of the installation and
replacement process and calculate those parameters based on the channel (rather than the particular device). Such tools
cannot be used for systems that contain a mixture of devices with and without power management enabled on the same
channel.
Tools based on the LNS
®
network operating system, such as the LonMaker
®
Integration Tool, correctly support all
configurations of PL Smart Transceiver based devices with or without power management. For a tool not based on LNS,
contact your tool vendor to determine if it can support a mixture of power management and non-power management
devices on the same channel.
Standard Transceiver Types
Two standard transceiver types are defined for the PL Smart Transceivers operating in A-band and four are defined for
C-band operation. These standard transceiver types specify communications parameters for a PL Smart Transceiver (or
PLT-22, PLT-21, or PLT-20) based device.
In A-band, the two available communication parameters differ only with regard to selection of the power management
feature.
In C-band, the communication parameters of the four standard types are identical except for the state of the CENELEC
protocol and selection of the power management feature.
Table 8.2 shows how the various features of the PL Smart Transceiver are selected using the six standard transceiver
types and OOGAS pin on the PL Smart Transceiver.
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