M1 for <6 contacts using single blocks in front mounting with integral LEDM2 for <6 contacts using single and double blocks in front mounting with integral LEDM6 for <2 contacts using single blocks in front mounting with integral LED and transformerM10 for <2 contacts using single blocks in front mounting with integral LEDC3 for <6 contacts using single blocks in front mountingC4 for <6 contacts using single and double blocks in front mountingC14 for <2 contacts using single blocks in front mounting |