Echelon LonPoint Module - Manual (Page 44)

4-8 Installation and Wiring of Base Plates
Connecting Wiring
Route network, power, and input/output cabling into the electrical enclosure using
suitable conduit fittings, bushings, or wire glands. It is good practice to separate the
input/output cabling as much as possible from the network and power cabling,
especially if low level analog signals are being supervised. Once the cabling has been
brought into the electrical enclosure, leave a service loop of 6 inches (15cm) of cable
to simplify wiring the Type 1 Base Plate. Dress the cables using tie wraps or tape to
ensure that the cabling is not compressed or caught when the base plate is screwed
into place.
Strip the cable jacket and wire conductors. The base plate screw terminals will accept
26AWG (0.4mm) to 12AWG (2.2mm) wire, which should be stripped to a length of
0.32” (8mm). Although not required, it may be useful to use a soldering iron to tin the
stripped lengths of any stranded wires to prevent fraying and inadvertent contact
with adjactent terminals. The screw terminal blocks on the real panel of the Type 1
Base Plate are color coded to simplify wiring. The color coding scheme is shown in
table 4.1. The optimum tightening torque for the Type 1 Base Plate screw terminals
is 4 lbs. in. (0.5Nm) maximum. The ideal flathead screwdriver tip width is 0.125”
(3mm).
Table 4.1 Type 1 Base Plate Terminal Block Color Coding*
Terminal Number Terminal Color Function
1 - 4 Orange Network
5 Orange Cable shield, if used
6 - 9 Black Power
10 - 18 Green I/O
* In beta release Type 1 Base Plates, terminals 5 and 14 were
connected together but not connected to any I/O. In Type 1 Base
Plate marked 1A, terminal 5 is floating and may be used to
connect cable shield wires; terminal 14 is reserved for I/O.
Two sets of screw terminals are provided for both the power and network wiring
connections. These connections are internally jumpered on the Type 1 Base Plate
PCB to provide continuity of the network and power wiring, even if no LonPoint
module is installed, as shown figure 4.8. 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 LonPoint module is ever installed. This
feature also prevents network and power interruptions as a result of hot-swapping
LonPoint 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.