Weidmüller RS SD25 BZ (Part No. 8537380000) is a DIN rail mounted D-Sub interface transfer module complying with IEC 60807 / DIN 41652 standards. It is equipped with a 25-pin female D-Sub connector on the control side and spring clamp terminal blocks on the field wiring side, which realizes quick signal conversion between PLC D-Sub cables and on-site equipment wiring.