RS485 interface type data module as retrofit kit, for:, SB 3000TL-20, SB 3600TL-20, SB 4000TL-20, SB 5000TL-20, SB 3000TL-21, SB 3600TL-21, SB 4000TL-21, SB 5000TL-21, SB 6000TL-21, SB 2500TLST-21, SB 3000TLST-21, STP 8000TL-10, STP 10000TL-10, STP 12000TL-10, STP 15000TL-10, STP 17000TL-10, STP 15000TLHE-10, STP 20000TLHE-10, STP 15000TLEE-10, STP 20000TLEE-10, STP 15000TL-30, STP 20000TL-30, STP 25000TL-30, WB 3600TL-20, WB 5000TL-20, WB 3000TL-21, WB 3600TL-21, WB 4000TL-21, WB 5000TL-21
