Endress+Hauser RTA421 Technical Information

TI00074R/09/EN/02.12
71196717
Technical Information
RTA421
Limit alarm switch
Alarm switch and power supply for monitoring current or voltage
signals
Application
• Plant and machine construction
• Panel builders
• Process monitoring
• Process control
Your benefits
• 2 relays for set point monitoring (with SPDT contacts)
• Loop power supply for connected sensors
• LC display for alarm set points and bar graph
• Compact housing
• Front end setup using 3 push buttons

Endress+Hauser RTA421 Specifications

General

Output	SPDT relay
Housing material	Aluminum
Protection class	IP66
Process connection	G1/2" or 1/2" NPT
Approvals	ATEX, IECEx