The PLT-22 transceiver uses a low-cost external coupling circuit and can
communicate over virtually any AC or DC power mains, as well as unpowered
twisted pair. The PLT-22 transceiver can use all of the same coupling circuits as the
PLT-21 transceiver.
The PLT-22 transceiver is supplied as a miniature uncoated Single In-Line Package
(SIP) which can be mounted on or inside an OEM product, directly adjacent to the
Neuron Chip with which it is used. The PLT-22 transceiver maintains drop-in pin
compatibility with the PLT-20 and PLT-21 transceivers while at the same time
providing smaller package dimensions to more easily fit into tight enclosures. When
connected to an external crystal, the transceiver can supply either a 1.25, 2.5, 5, or
10MHz clock signal for the Neuron Chip, eliminating the need for a separate Neuron
Chip crystal.
The transceiver communicates at a raw bit rate of 5kbps. With the CENELEC
protocol disabled, the transceiver has a maximum packet rate of 20 packets per
second. With the CENELEC protocol enabled, the transceiver has a maximum
throughput of 18 packets per second. This high throughput makes the transceiver
well suited for residential, commercial, and industrial automation applications.
For commercial and industrial applications in high rises, manufacturing plants,
utility substations, and other large facilities, the PLT-22 transceiver can be used
with Echelon's PLA-21 Power Line Amplifier. Capable of transmitting a 10Vp-p
signal with 2Ap-p current drive, the PLA-21 amplifier is ideal for driving multiple
phase coupling circuits, high attentuation power circuits, and very low impedance
loads near circuit breaker panels and distribution transformers.
This guide describes the use of the PLT-22 transceiver in the 110kHz to 140kHz
frequency range. The PLT-22 transceiver also supports communication in the
CENELEC utility band (European A-band from 70 to 95kHz) when the transceiver is
used with a different external crystal and modified coupling circuit. For CENELEC
utility applications, refer to the companion user’s guide,
Using the L
ON
W
ORKS
PLT-
22 Power Line Transceiver in European Utility Applications
.
L
ON
W
ORKS
PLT-22 Transceiver User’s Guide
1-3
Summary of Contents for LONWORKS PLT-22
Page 6: ...iv Echelon...
Page 14: ...1 8 Introduction...
Page 67: ...LONWORKS PLT 22 Transceiver s User Guide 5 7 Figure 5 3 Capacitor Input Power Supply Schematic...
Page 92: ...6 10 Design and Test for Electromagnetic Compatibility...
Page 110: ...7 18 Communication Performance Verification...
Page 114: ...8 4 References...
Page 118: ...A 4 Appendix A...
