akYtec | Faq | PROGRAMMABLE RELAYS | Compatibility with HMI? What does a HMI need to be working with the PR-devices? Compatibility with HMI? What does a HMI need to be working with the PR-devices? Any HMI device compatible with the Modbus RTU Protocol is of displaying process values and can be utilized as an HMI with the PR device series. PR200, PR102, PR103, PR100 PROGRAMMABLE RELAYS Rate the answer? You rated this of 5 | Total rating: 0.0 Back to All Topics