These are CMI modules have Serial Comunication outputs.

£ 35.40 35.4 GBP Excl. VAT
£ 116.87 116.87 GBP Excl. VAT
£ 111.09 111.09 GBP Excl. VAT
£ 45.88 45.88 GBP Excl. VAT
£ 64.49 64.49 GBP Excl. VAT
£ 43.53 43.53 GBP Excl. VAT
£ 74.96 74.96000000000001 GBP Excl. VAT