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Click for Name list TB20 Head Units 600-900-9AA01 600-160-1AA11 600-175-1AA11 600-151-1AA11 600-180-1AA11 Automation Warehouse Ph: 0734880177 email: click	Note: indicative image may not reflect actual product ® STEP, S7-200, S7-300, S7-400, WinCC, SIMATIC are registered trademarks of Siemens	TB20 Base module Spare Part Number: 600-900-9AA01 Description: Base module for TB20 which the Electronic module plugs into. Note: This is a spare part only, every I/O module comes with a base module. Login for Pricing