akYtec | Faq | PROGRAMMABLE RELAYS | How can I connect an expansion module of the Mx110 series to the PR200? How can I connect an expansion module of the Mx110 series to the PR200? A module of Mx110 series can be connected to the PR200 via the RS485 interface and Modbus protocol. PR200 PROGRAMMABLE RELAYS Rate the answer? You rated this of 5 | Total rating: 1.0 Back to All Topics