Trimble Panel Attachment Cover for S-Series Total Stations Protect the Trimble CU controller attachment panel on compatible Trimble S-Series Total Station s when a controller is not installed. This genuine Trimble cover attaches directly to the instrument’s panel holder and helps provide the required ESD and environmental protection during field use. Key Features Covers and protects the Trimble CU attachment panel when a controller is not mounted to the instrument. Helps maintain ESD and environmental protection for the exposed panel connection.