CPMS - Cathodic Protection Monitoring System
8Pages

CPMS Cathodic Protection Monitoring System October 2008 Description The CPMS Cathodic Protection Monitoring System monitors above and below ground impressed current cathodic protection systems to ensure that proper corrosion protection is in place and operating at the right levels. Part of Moore Industries’ NET Concentrator System® family of intelligent distributed I/O, the CPMS monitors the critical current and voltage levels of one or two transformer rectiers used in cathodic protection systems. Each module provides four or eight, fully-isolated analog input channels and four discrete (contact closure) inputs. It “concentrates” this data onto one or multiple communication links, and transmits it long distances back to one or more host DCS, PLC or PC-based control systems. Alarm Inputs— The CPMS accepts up to four discrete (contact closure) inputs from the monitored system. Using an internal control engine, the CPMS can be programmed with internal set points that relate to normal operating conditions within the cathodic protection system. Should monitored parameters go outside of selected limits, or if power to the cathodic protection system is lost, the CPMS alerts of the unwanted conditions at the control system over the data link. Expansion I/O—In addition to operating in a standalone mode, the CPMS integrates with any of Moore Indusries’ NET Concentrator System’s analog, temperature, discrete and relay I/O modules (see Pages 4 and 7) to allow up to 124 signal inputs and outputs to be transmitted long distances on one low cost data link. Figure 1. The stand-alone CPMS accepts four or eight analog inputs and four discrete (contact closure) inputs. Rangeable 0-100Vdc 0-100mV –5 to +5Vdc 4-20mA Discrete Contact Closure Inputs Features • Simultaneous dual MODBUS RTU and Ethernet communications. The CPMS comes standard with dual MODBUS RTU (RS-485) ports and one Ethernet (MODBUS/TCP) port. An industry-standard OPC interface delivers plug-and-play integration with popular PC-based HMI/SCADA software packages. • MODBUS RTU master capability. One or both of the CPMS MODBUS RTU (RS-485) ports can be congured as MODBUS master ports. • Installs in harsh environments. The CPMS features rugged metal construction, superior RFI/EMI protection and an industry-best ambient operating temperature of –40°C to +85°C (–40°F to +185°F). • Quick and simple programming. Using the Internet Explorer web browser, all input and operating parameters can be selected and set in minutes. CPMS Cathodic Protection Monitoring System Dial-Up Ethernet Dual Independent Modem for (10/100Base-T) MODBUS RTU Communications Programming (RS-485) and Monitoring Communications (Optional) The DIN-rail mount CPMS features rugged metal construction that stands up to the daily rigors of demanding process and factory automation applications. PC Port for Programming and Monitoring • Data logger with battery back-up. For historical performance trending and analysis, the CPMS can archive up to 64,000 time and date stamped values. • Advanced control and math capabilities. Using ISaGRAF Control Engine Software from ICS Triplex, the CPMS delivers complex control, such as PID, and computation functions (see Page 8 for details). CE Conformant—EMC Directive 2004/108/EC EN61326; Low Voltage Directive 2006/95/EC EN61010 Page 1

CPMS Cathodic Protection Monitoring System MODBUS RTU Network Master or Slave Each CPMS MODBUS RTU (RS-485) port can be programmed to act as a master or slave within a network (each port is congured by the factory as a MODBUS slave port). When set as the master, the module performs all network polling functions. This includes polling of up to 32 (without repeaters) CPMS stations, Moore Industries NET Concentrator System stations and/or third-party MODBUS slave devices per port. The CPMS will handle up to 64 slave devices if both MODBUS RTU ports are used. With repeaters, additional CPMS...

CPMS Cathodic Protection Monitoring System System Architecture The CPMS can be used to send just a few, or hundreds of, process signals between the eld and a control system. Industrially-hardened and congurable interface stations mount throughout a site, or in dispersed locations throughout the world, to provide cost-effective distributed data acquisition and, with expansion I/O, control capabilities (see Pages 4 and 7). The saves time and money when used in place of hard-wired schemes. Concentrate just a few, or hundreds of process signals, onto a single digital data link. This saves...

CPMS Cathodic Protection Monitoring System Figure 4. Expansion I/O (see Page 7) allows each stand-alone CPMS station to handle up to 124 signals in a MODBUS network. The number of CPMS stations that can be used in a Ethernet network is limited only by the architecture of a specic network (taking into account the physical limitations of Ethernet). CPMS Station (Dual MODBUS Master Capability) Expansion I/O Up to 15 (with 1CIM input type) and 14 (with 2CIM input type) Expansion Modules Per CPMS CPMS Cathodic Protection Monitoring System Module Number Dual, Independent MODBUS RTU (RS-485) Ports...

CPMS Cathodic Protection Monitoring System Specications Communi- MODBUS: cations Type: Two independently congurable RS-485 ports (according to EIA-485, 1993) Protocol Type: MODBUS RTU Baud Rates: 1200, 2400, 4800, 9600, 19.2k, 38.4k and 57.6k (user-selectable; default is 9600) Parity: Even, Odd or No Parity (1 stop bit, xed; default is No Parity) Device Address: 1-247 (Default is 1) Character Timeout: 5, 10, 25, 50, 100, 200 and 255 character times (userselectable; factory set to default) Response Delay: 1-255 character times (userselectable; factory set to default) ETHERNET: Ethernet Port:...

CPMS Cathodic Protection Monitoring System Ordering Information Unit CPMS Cathodic Protection Monitoring System Module 1CIM Four rangeable cathodic protection monitoring channels with four discrete (contact closure) input channels (see Table 3) 2CIM Eight rangeable cathodic protection monitoring channels with four discrete (contact closure) input channels (see Table 3) COM Redundant (Dual) MODBUS RTU (RS-485) communication links and one Ethernet (MODBUS/TCP) communication link To order, specify: Unit / Input / Output / Power / Options [Housing] Model number examples: CPMS / 2CIM / COM /...