353 Process Automation Controller The Model 353 Process Automation Controller (PAC) is designed for a broad range of process applications. It can serve as an advanced singleloop controller or as a multiloop controller with complete control functions, including indication, control, logic, or sequencing for a small unit process. The 353 controller’s Ethernet and MODBUS communications enable it to function as an integral element in a plant system. Ethernet (MODBUS TCP/IP protocol) supports peer-to-peer communication. The front configuration port allows connection to a PC for configuration. The 353 Basic unit provides sufficient analog I/O to support dual loop or cascade control applications. It also supports digital inputs and outputs. The 353 Expanded unit provides complementary I/O for thermocouple, RTD, pulse, and frequency inputs and relay outputs. The design includes the Modbus RS-485 and Modbus Ethernet communications as standard. Ethernet I/O modules extend the controller I/O density and that allows the user to take advantage of the controller’s powerful and versatile control capability. The Model 353 controller supports function block programming language. It has an extensive library of function blocks for analog process control, Boolean logic, and specialty applications. The controller can be configured either through faceplate or with the iConfig Graphical Configuration software. Loop data is mapped to the Modbus communication registers in accordance with the configured loop application. Process Instrumentation & Analytics Answers for industry. Specifications Inputs Outputs Electrical and Environmental Analog Inputs (non-isolated) 1-5 Vdc, 4-20 mA with included 250 resistor Analog Outputs (non-isolated) 4-20 mA into 800 ohms (max.) Power Supply Standard: 120/240 Vac (85 to 264 Vac); 47 to 63 Hz Optional: 24 Vdc, +20%, –15% Power Requirements 25 Watts, 40 VA (max.) 2-Wire Transmitter Power Voltage: 25 Vdc ±3V Current: 120 mA, short circuit protected Digital Outputs (non-isolated) Open Collector Transistor (emitter@station common) Load Voltage: 30 Vdc (max.) Load Current: 100 mA (max.) Digital Inputs (isolated) 0-1 Vdc OFF, 15-30 Vdc ON Analog Input, Universal (isolated) Thermocouple, RTD, Ohms, Slidewire, Millivolt Digital/Frequency Input, Universal (isolated) Frequency Range: 0 to 25,000 Hz Minimum Operating Frequency: 0.05 Hz ON Voltage: 4-30 Vdc OFF Voltage: 0-1 Vdc Input Current: <5 mA @ 30 Vdc Relay Outputs (SPDT) Contact Rating: 5A @ 120 Vac, 2.5 A @ 230 Vac, Resistive Load PAC 353 Design B PAC 353 Design B with Expanded I/O Analog Input 3 4 Universal Analog Input 0 2 Analog Output 2 3 Discrete Input 3 4 Universal Discrete Input 0 2 Discrete Output 2 2 Relay Output 0 2 Configuration Port Standard Standard MODBUS Interface Standard Standard Ethernet Interface Standard Standard Real-time Clock Standard Standard Removable Configuration Media Standard Standard Siemens Industry, Inc. 3333 Old Milton Parkway Alpharetta, GA 30005 1-800-964-4114 Subject to change without prior notice Order No.: PIFL-00009-1109 All rights reserved Printed in USA ©2009 Siemens Industry, Inc. The information provided in this brochure contains merely general descriptions or characteristics of performance which in case of actual use do not always apply as described or which may change as a result of further development of the products. An obligation to provide the respective characteristics shall only exist if expressly agreed in the terms of contract. [email protected] www.usa.siemens.com/ia All product designations may be trademarks or product names of Siemens AG or supplier companies whose use by third parties for their own purposes could violate the rights of the owners.