Echelon DM-21 Device Manager - Manual (Page 36)

3-16 Network Cabling and Base Plate Installation
Table 3.5 Type 1D Base Plate Terminal Block Connections
Terminal Number Function
1 -4 Network
5 Cable shield, if used
6 - 9 Power
10 – 13, 17, 18 4-bit subsystem selection input
Two sets of screws are provided for both the power and network wiring
connections. These connections are internally jumpered on the Type 1D Base
Plate PCB to provide continuity of the network and power wiring, even if no
module is installed, as shown in figure 3.15. This feature permits the base plate
wiring to be pre-installed and the network and power circuits checked for
continuity throughout the installation, before a single module is ever installed.
This feature also prevents network and power interruptions as a result of hot
swapping modules during commissioning or service operations. Finally,
providing two sets of screw terminals permits incoming and outgoing wiring to be
landed at separate screw terminals without the need to insert more than one wire
in any given screw terminal.
1 2 3 4 5 6 7 8 9
Network 16-30VAC or VDC
Figure 3.15 - Type 1D Base Plate Power and Network Wiring Connections
Connecting the Jumper Plug(s)
From time to time it may be necessary to mount two or more LonPoint Type 1D
Base Plates adjacent to one another. In these instances, power and network
wiring must be daisy-chained between each Base Plate. Routing power and
network wiring between multiple base plates can be a laborious and time
consuming task, and there is always the risk of a wiring error. For this reason,
the Type 1D Base Plates are each supplied with a Jumper Plug and Jumper Plug
connectors which simply and easily bus the power and network between adjacent
Base Plates.
The Jumper Plug connectors are located on either side of the terminal block with
connections 1 to 9 . The Jumper Plug connectors are wired in parallel with the
network and power connections on the screw terminals. When two Base Plates
are mounted adjacent to each other, with the mounting arrows pointing in the
same direction, the Jumper Plug connectors will be aligned such that a Jumper
Plug may be inserted into the two connectors, thus bridging power and network
between the two Base Plates (figure 3.16).