akYtec | Faq | PROGRAMMABLE RELAYS | How many Modbus Slaves can the PR200 control as Master Device? How many Modbus Slaves can the PR200 control as Master Device? The PR200 as Modbus Master can control up to 16 Slave Devices over each RS485 interface. Each Slave Device can process up to 256 variables. PR200 PROGRAMMABLE RELAYS Rate the answer? You rated this of 5 | Total rating: 0.0 Back to All Topics