RM series relay modules can be mounted on different DIN rail, such as TS-15, TS-32 or TS-35. Every channel of RM-104, RM-108, and RM-116 contains 1 Form C relay while every channel of RM-204, RM-208, and RM216 contains 2 Form C relays. The reverse polarity protection is provided to prevent improper operation. Every channel also has an LED to indicate its status. RM series modules include 4-channel relays, 8-channel relays and 16-channel relays versions for different applications.