Specification
| Electrical | |
| Contact rating | 3 (1) Amps 230V AC |
| Contact type | Micro-disconnection Voltage-free C17 only) |
| Rated impulse voltage | Cat 2 – 2500V |
| Supply | 230V AC 50Hz only |
| Environmental | |
| Pollution degree | Degree 2 |
| Class a software | Type 1 Control |
| Operating temperature range | 0 °C to +40 °C |
| Battery life | Minimum 10 months continuous operation |
| Mechanical | |
| Case material | Thermoplastic flame retardant |
| Dimensions | 84 x 150 x 29mm |
| Features | |
| Display | Back-lit liquid crystal |
| Clock | 12-hour am/pm Auto BST/GMT changeover |
| Displayed time adjustments | 1-minute steps |
| Switched time adjustments | 10-minute steps |
| Operating periods | 3 per-day per-channel. Separate programmes possible for each day of the week |
| Override | C17: 1-hour boost, 1- hour extension to On period & Instant advance C27: 1-hour boost (HW only), 1-hour extension to On period (HW only) and instant advance (CH only) |
| Mounting | 6 terminal plug-in wall plate |
| Enclosure protection | Flame retardant thermoplastic |
