CCS WattNode Revenue RWNC-3D-240-MB, Installation And Operation Manual

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6 Overview
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Option CT=xxx/yyy/zzz - Pre-assign xxx to CtAmpsA , yyy to CtAmpsB , and zzz to
CtAmpsC .
Communication Options
●
Option EP
- Factory configure the Modbus RS-485 communications to even parity (E81).
●
Option 19K - Factory configure the RS-485 communications 19,200 baud. Position 8 of the
DIP switch will be ignored.
●
Option 38K
- Factory configure the RS-485 communications to 38,400 baud. Position 8 of
the DIP switch will be ignored.
●
Option TCP‑RTU - Configure the communications to the Modbus TCP-RTU protocol option
for use with RS-485 to Ethernet gateways (serial device adapters).
●
Option AD
- Factory configure the Modbus address. The DIP switch address will be ignored.
X Terminal Options
These options utilize the
X
(auxiliary) terminal on the
MODBUS
connector. Only one of these can
be ordered on any single meter.
●
Option X5 - Provides 5 VDC at up to 60 milliamps between the
C
(common) and
X
(5 V)
terminals.
●
Option IO
- Provides a digital input (level sensing and pulse counting) or output (for load
shedding and other applications) on the
X
terminal.
●
Option SSR - Provides a solid-state relay (contact closure) output between the
X
and
C
terminals for load shedding and other applications.
Special Options
Contact the factory about the following special options:
●
Option 232 - Provide RS-232 I/O in place of RS-485.
●
Option TTL - Provide 5 V TTL UART I/O in place of RS-485.
Current Transformers
The WattNode meter uses solid-core (toroidal), split-core (opening), and bus-bar style current
transformers (CTs) with a full-scale voltage output of 0.33333 Vac. Split-core and bus-bar CTs
are easier to install without disconnecting the circuit being measured. Solid-core CTs are more
compact, generally more accurate, and less expensive, but installation requires that you discon-
nect the circuit to install the CTs.
Additional Literature
These additional documents are available on the Continental Control Systems, LLC website or
Modbus.org website.
●
WattNode Modbus - Quick Install Guide
●
WattNode Modbus Register List (Excel format): WNC-Modbus-Register-List-V18.xls
●
Continental Control Systems, LLC website
○
http://www.ccontrolsys.com/w/WattNode_Modbus - main page.
○
http://www.ccontrolsys.com/w/Category:WattNode_Modbus - support articles.
●
http://www.modbus.org/specs.php
○
Modbus Application Protocol Specification - V1.1b
○
Modbus over Serial Line - Specification & Implementation Guide - V1.0