691 series connectors are available in both cable and flange versions and have an M25 screw locking mechanism and a solder connection. They comply with protection class IP40 with an operating temperature range from -40 ⁰C to +85 ⁰C. These connectors are available with 3 to 12 contacts with a rated current of 5 A (125 V) and 10 A (250 V) depending on the number. The diameter of the cable connector/cable socket is 28 mm, the flange version has a diameter of 42.5 mm. Both are shieldable.