| SPECIAL VERSION |
| Code | Description |
| RTL 511/AG | Local unit for control of wall-mounted expander; enclosure silver finish |
| RTL 511/AL | Local unit for control of wall-mounted expander; enclosure alluminium finish |
| RTL 511/B | Local unit for control of wall-mounted expander; enclosure black finish |
| RTL 511/GY | Local unit for control of wall-mounted expander; enclosure grey finish |
| ACCESSORIES |
| Code | Description |
| ASA 2418 | Cable for powering RTL 1.. and RTL 5.. directly with 24 V AC |
| ALD 110 | Cable for powering RTL 111 & RTL 511 directly with 24 Volt~ |