The following Relay Modules are available for various control purposes
4 Changeover Relays (1 Form C) rated at 230VAC or 30VDC, 4 Amps for switching or dry contact.
12V Coil can be connected to Comfort 12V outputs
RLY01H is a replacement for RLY01 which was only for low voltage switching < 30V
Download the manual from http://www.cytech.biz/rly02_relay_manual.html