Process amplifier makes a big display
A
Magna Projects and Instruments product story
Edited by the Engineeringtalk editorial team
May 27, 2002
The SMP surface mounting process amplifier is a versatile instrument with an easy-to-read 12.7mm 4.5-digit LCD which allows a range of input signals to be conditioned, displayed and transmitted.
The SMP surface mounting process amplifier is a versatile instrument fitted with an easy-to-read, 12.7mm, 4.5-digit LCD which allows a range of input signals to be conditioned, displayed, and transmitted in analogue and digital forms.
It has an intelligent base unit incorporating user-configurable 4-20mA and 0-10V analogue outputs, and has a choices of input, power suppliers, communications and relay modules.
High accuracy, low drift and PID control, and digital programming, linearisation and display are all features.
The instrument is housed in an IP65 surface-mounting case 200 x 120 x 75mm, all inputs and outputs are isolated, and mains- and DC-powered versions are available, as are a remote, panel-mounting display and DIN-rail mounting options.
The SMW version, especially designed for weighing applications, has a high-resolution option with 19bit (approx 1 part in 500,000) input resolution, a 6-digit LCD and four-point linearisation.
Input modules include Types J and K thermocouples, PT100 resistance thermometers, rate/totaliser, +/-200mV, fast (10ms) strain gauge, and for single and dual channel LVDT, 4-20mA and 0-10V DC signals.
Input resolution is 15bits (1 part in 32,768 or 0.003%), The relay output module provides two set points together with in-flight compensation.
The relays may be inverted or latched, with scaling in engineering units for ease of use.
The default display may be configured to show either gross or nett values.
Communication options available are 20mA noise-immune current loop, RS232 and multidrop RS485.
Via the digital port, the input variable may be viewed and the setup parameters configured.
Communications protocol options include ASCII, Modbus RTU and Mantrabus, and baud rates may be selected between 300 and 19,200baud.
Up to 254 SMP or SMW units fitted with 20mA ports may be connected to one RS232 port via the optional IF25 interface, and up to 25 units fitted with the RS485 option may be connected to one RS485 port on a PC, PLC or mainframe computer.
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