A420 Alfatron

RS-232 20mA Current Loop Converter Provides Optical Isolation and Transient Protection Features l Optically isolated data lines and high speed data transfers, e.g. 19,200bps over 400 metres and a maximum data rate of 64Kbps l Uses Hewlett Packard Opto-couplers for 20mA l Available as a pre-set, fully isolated pair (2500Vac for 1 minute) l Full Duplex point-to-point communication using only 4 wires (one pair each for receive and transmit data) ASeries A420 l Screw terminal connector on 20mA side l Current Loop Transmit and Receive lines are switch selectable for ACTIVE and PASSIVE l Switchable DCE/DTE selection for RS-232 port Applications l LED indicators for data activity 34 Connect a 20mA Current Loop device to a PC using l Can be used in multidrop environments the A420 interface converter. l Very LOW COST - Very BIG FEATURES 20mA Device A420 Specifications - ASeries A420 RS-232 Port: Asynchronous RS-232 DB-25 female connector Switch Selectable DCE/DTE Transfer up to 64Kbps 20mA Port: 20mA Current Loop 34 Use two A420s to connect RS-232 devices separated Screw Terminal Block (2.5mm dia.) by up to 1km. Connecting via 20mA Current Loop Optically coupled 20mA Transmitter takes advantage of its noise immunity properties. Optically coupled 20mA Receiver RD and TD loops may each be configured as either ACTIVE or PASSIVE Optically isolated 20mA signal RS-232 Device Isolation in PASSIVE mode only A420 A420 Protection: Transient Voltage Supression Diodes RS-232 - Transmit Data Line - Receive Data Line - all unused handshake lines are tied to a common voltage rail. 20mA - Transmit Data pair - Receive Data pair 34 Where isolation is a requirement, particularly in a LED Indicators: Receive Data RS-232 harsh industrial environment, the A420 can withstand Receive Data 20mA Current Loop Power On 2500Vac for up to one minute. Power Supply: 9V (200mA) DC 34 The 20mA Current Loop breaks the ground loop at Reverse Polarity Protection each end so the A420 is suitable for inter-building Dimensions: 84m x 58mm x 23mm communications where different ground potentials Weight: 160 grams can make RS-232 unreliable. All Specifications subject to change without notice Alfatron Pty Ltd ACN 005 410 819 PO Box 4161 Unit 9, 36 New St. Ringwood VIC 3134 AUSTRALIA Tel: +61-3-9876 9011 Fax: +61-3-9876 9044 A420BRO Feb 2002 Email: sales alfatron.com.au Web Site: www.alfatron.com.auX-ON Electronics Largest Supplier of Electrical and Electronic Components Click to view similar products for alfatron manufacturer: Other Similar products are found below : A420 A440