model 251 Optical isolation Interface converter Manual

Update: 30 September, 2023

Model 251 is an RTS controlled transmit optically isolated RS-232 to RS-485 interface converter that can convert RS-232 TXD and RXD signals to balanced half-duplex RS-485 signals. On the RS-232 side, Model 251 is powered by 20 pins (DTR) and 4 pins (RTS) control signal lines. DTR must always be set to a high level. RTS must be switched between high level (when transmitting) and low level (when receiving) so that Model 251 can operate normally.

---

File format: PDF

Size: -

MD5 Checksum: 5EAA9A526E7C17B8BE96EA5D1E74AC21

Publication date: 21 February, 2012

Downloads: -

PDF Link: model 251 Optical isolation Interface converter Manual PDF