Four-Channel Digital-to-Analog Convertor for the Siemens Digital Level Sensor Providing for interface-to-analog SCADA systems The digital-to-analog convertor is a solidstate, stand-alone interface board that polls the Siemens digital level sensor (DLS) and outputs a 4-20mA analog signal for use by SCADA systems having only analog inputs available. The interface board can poll up to four digital level sensors and output up to four analog signals. The analog signal can output level or temperature data from a particular sensor. Electrical specifications Operating temperature range: -40 °C to +85 °C Power requirements: 12 to 15 VDC Power consumption Standby: 38mA Published by and copyright © 2010: Siemens AG Energy Sector Freyeslebenstrasse 1 91058 Erlangen, Germany Siemens Energy, Inc. Oil & Gas Division 10730 Telge Road Houston, TX 77095 USA 1 (888) 856-4528 www.siemens.com/energy/ oilandgas Order No. E50001-D440-A146-X-76US Printed in USA BU 1430F IN 0910.25 All rights reserved. Subject to change without prior notice. Trademarks mentioned in this document are the property of Siemens AG, its affiliates, or their respective owners. The information in this document contains general descriptions of the technical options available, which may not apply in all cases. The required technical options should therefore be specified in the contract. During poll: 145mA* (polling time = two-second max) Analog outputs: 20mA max per channel if unit sources loop power *Power consumption does not include connected level sensors. RS232 port Provided for configuration and diagnostics 9600 or 1200 baud rate 4-20mA conversion accuracy* Resolution: 16 bit Monotonicity: 16 bit minimum Integral non-linearity: +/- 0.01% of FS max Offset (4mA) at 25 °C: +/- 0.01% of FS max Offset drift: +/- 0.25 ppm/°C Total output error: +/- 0.2% of FS max Total output drift: +/- 50 ppm/°C VCC supply sensitivity: 50 mA/mV *Except as limited by sensor and protocol resolution Communicates using HyperTerminal or similar terminal emulation software using ASCII commands RS485 port Two- or four-wire communications Cycles power between polls Answers for energy. For more information about this and other digital level sensor products and applications, contact us at 1 (888) 856-4528 or [email protected].