Carrier 48/50HC04-28 Controls, Start-up, Operation And Troubleshooting

Also see for 50HCQ04---12: Controls, Start-Up, Operation and Troubleshooting Instructions Service and maintenance instructions

Carrier 48/50HC04-28 Controls, Start-up, Operation And Troubleshooting Manual pdf 14 page image

14SW3 Protocol SelectionPROTOCOL DS8 DS7 DS6 DS5 DS4 DS3 DS2 DS1BACnet MS/TP(Master) Unused OFF OFF OFF ON OFF Select Baud Select BaudModbus(Slave) Unused OFF OFF ON ON OFF Select Baud Select BaudN2(Slave) Unused OFF OFF OFF ON ON OFF OFFLonWorks Unused ON ON OFF ON OFF OFF ONNOTE:DS = Dip SwitchBACnet MS/TP SW3 example shownBaud Rate SelectionsBAUD RATE DS2 DS19600 OFF OFF19,200 ON OFF38,400 OFF ON76,800 ON ONC07166Fig. 14 -- RTU Open SW3 Dip Switch SettingsC10815Fig. 15 -- RTU Open Address SwitchesC10816Fig. 16 -- Network WiringModbusThe RTU Open module can speak the Modicon ModbusRTU Protocol as described in the Modicon ModbusProtocol Reference Guide, PI----MBUS----300 Rev. J. Thespeed of a Modbus network can range from 9600 to 76.8Kbaud. Physical Addresses can be set from 01 to 99.Johnson N2N2 is not a standard protocol, but one that was created byJohnson Controls, Inc. that has been made open andavailable to the public. The speed of N2 network islimited to only 9600 baud. Physical Addresses can be setfrom 01 to 99.LonWorksLonWorks is an open protocol that requires the use ofEchelon’s Neuron microprocessor to encode and decodethe LonWorks packets. In order to reduce the cost ofadding that hardware on every module, a separateLonWorks Option Card (LON--OC) was designed toconnect to the RTU Open.This accessory card is needed for LonWorks and has to beordered and connected using the ribbon cable to plug J15.The RTU Open’s baud rate must be set to 38.4k tocommunicate with the LonWorks Option Card. The addressswitches (SW1 & SW2) are not used with LonWorks.48 ---50LHTCQ ---01T