Rv-C Control System Introduction - NewMar SilverLeaf RV-C Control System Training Manual

Newmar SilverLeaf Control System
Diagnostic and Repair Procedures

RV-C Control System Introduction

The SilverLeaf Control System is a RV-C (CAN bus) based multiplex networked control system that uses
multiple specialized control nodes (modules) to monitor and control the various systems in the RV. The
RV-C network, in its simplest form, consists of a trunk cable made up of a twisted pair cable with 120 Ohm
terminating resistors at each end of the trunk run. The nodes are connected to the network via drop
cables attached to the trunk cable at any convenient location along the trunk. The trunk and drop cables
provide the RV-C network communications. In its basic form, the RV-C network does not provide power
for the nodes over the network. The power to the nodes is supplied by separate dedicated wiring.
The RV-C network scheme that Newmar employs for the SilverLeaf control system consists of multiple 4
conductor Trunk cable segments connected together by "Drop Tees". The modules are connected to the
network via Drop cables that plug directly into the tees. The Trunk segments are made up of a 2 wire
twisted-pair communications cable along with separate 12 VDC power and ground wires bundled
together into a single cable assembly. The Trunk cables are terminated with 4 pin mini-fit jr connectors on
each end of the cable. The "Drop Tees" are either a single or multiple "Drop Tee". The Tees have a mating
mini-fit jr connector on each end with one or more drop mini-fit jr connectors along the adjacent edge.
The beginning and end of the entire Trunk has a Terminating Resistor built into the last Drop Tee Board.
The terminating resistors are required to assure proper communications across the network. The control
nodes are interfaced to the network using Drop cables similar in construction to the Trunk cables. The
standard drop cables have a 4 pin mini-fit jr connector for connection to the drop tees on one end with a
12 pin mini-fit jr connector for the node connection on the other end. Some of the drop cables also have
additional wiring on the node end connector to accommodate other control interface functions. In this
application the network provides both the communications and power to the nodes via the 4 pin
connectors.
Currently there are two networked nodes that do not receive their power over the network. The TM-102
Total Coach Manager and the TM-502 Magnum Master are both constantly powered from separate fuses
located on the Power Relay Board mounted on the back bulkhead of the Shore Power Electrical
Compartment. The Power Relay Board is supplied with constant 12 VDC house battery power via a mini-
breaker connected directly to the house battery bank. This circuit in not supplied from the Battery
Disconnect power supply. All other nodes are powered over the network from a fuse located on the 12
VDC fuse panel mounted to the back bulkhead in the Shore Power Electrical Compartment. The network
power is supplied from the Battery Disconnect power supply.
Refer to Newmar "RV-C Layout" drawing for a detailed network layout.
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