This FAQ has been written for NEAL (North East Africa and Levant) region. If you are looking for information for another region, please select the correct country from the top-left dropdown in the page and 'Navigate to Browse FAQs' in the Support menu.
MS/TP
MS/TP is a token-passing local area network (LAN) field bus that is built into all TAC BACnet
controllers. The protocol supports a combination of shared resource and peer-to-peer
communications, where more than one controller can be the network master at any given time.
Electrically, MS/TP adheres to standard RS-485, physically wired using two-conductor shielded
twisted pair cable.
RS-485 Cable Specifications
Cables used to form the RS-485 network should conform to the following specifications:
Wire Size: 22-24 AWG
Cable Type: Twisted-pair, copper wire, tinned
Shield: Braid
Nominal Impedance: 100-120 (
Velocity of propagation: 78%
Capacitance: <12.5 pF/ft between conductors and < 22 pF/ft between the conductor
connected to ground and the next conductor.
Released for:Schneider Electric Egypt and North East Africa
This FAQ has been written for NEAL (North East Africa and Levant) region. If you are looking for information for another region, please select the correct country from the top-left dropdown in the page and 'Navigate to Browse FAQs' in the Support menu.
MS/TP
MS/TP is a token-passing local area network (LAN) field bus that is built into all TAC BACnet
controllers. The protocol supports a combination of shared resource and peer-to-peer
communications, where more than one controller can be the network master at any given time.
Electrically, MS/TP adheres to standard RS-485, physically wired using two-conductor shielded
twisted pair cable.
RS-485 Cable Specifications
Cables used to form the RS-485 network should conform to the following specifications:
Wire Size: 22-24 AWG
Cable Type: Twisted-pair, copper wire, tinned
Shield: Braid
Nominal Impedance: 100-120 (
Velocity of propagation: 78%
Capacitance: <12.5 pF/ft between conductors and < 22 pF/ft between the conductor
connected to ground and the next conductor.
Released for:Schneider Electric Egypt and North East Africa
