Chapter
2
21
Introducing the PLC2/DHII Interface
This chapter gives you an overview of the 1779-KP2 interface, its
function, its application in a communication network, and the types of
messages it sends and receives.
The PLC-2/DHII interface is a standalone unit consisting of:
One Stationary Frame
One Removable Frame
One Power-Supply Board (Cat. No. 1779-PH2)
One PLC-2 Host Board (Cat. No. 1779-JP2)
One Media Access Controller Board (Cat. No. 1779-JMA)
A redundant PLC-2/DHII interface has a redundant media access
controller board (Cat. No. 1779-JMAR) instead of a Media Access
Controller board.
The stationary frame mounts on the back panel of an enclosure
(Figure 2.1). The removable frame fastens to the stationary frame.
The removable frame contains the power-supply board, the PLC-2 host
board, and the media access controller (MAC) board. A shield separates
the power-supply board from the PLC-2 host board and the MAC
(Figure 2.2).
Chapter Objectives
What Is the PLC2/DHII
Interface?
