Siemens 3RH2140-1AB00 4 pole 10 AMP Control Relay with 4 N.O. and contacts and a 24 volt AC coil - Screw Terminals: Amazon.com: Industrial & Scientific
Siemens LZS: PT5 A5L24 Indus. Sector Socket Relay 24VDC 4 W Red LED Switch Relay 4011209674431 : Amazon.de: DIY & Tools