Modicon M241 Plc Page 14 Communication bus

14 Presentation RS 232/RS 485 serial links offer a simple solution to the communication needs of machines. Modbus and ASCII standard communication protocols are used to connect numerous equipment items such as: HMIs, printers, energy meters, variable speed drives, motor starters, remote I/O (RIO), etc. Description 2 1 Modicon M241 logic controllers have the following on their upper surface: 1 A "Serial 1" serial link port with an RJ45 connector delivering a 5 V/200 mA power supply which allows the use of a Magelis HMI, the Bluetooth communication adapter or other devices. 2 A 2nd "Serial 2" serial link port (with connection on screw terminals). Controller Type Embedded Ports Serial 1" port, RJ45 connector "Serial 2" port, connection on screw terminals TM241 pppp RS 232/RS 485 with 5V (200 mA) power supply for HMI or Bluetooth communication adaptor (item 1 ) RS 485 (item 2 ) 3 Modicon M251 logic controllers have on their front a serial link port with an RJ45 connector delivering a 5 V/200 mA power supply which allows the use of a Magelis HMI, the Bluetooth communication adapter or other devices. 3 A serial link port (RJ 45 connector (RS 232 or RS 485). Modbus serial link wiring system Non-isolated bus Isolated bus (recommended for bus > 10 m (32.808 ft) HMISCU 1 5 4 1 4 3 5 4 2 4 2 4 ON Imax: 63A iEM31 C/- DI N.C. C DO N.C. 0V D1/+ D0/- 5 5 V c 6 SL1 SL2 SL1 SL2 - Total length of cables between M241/M251 and ATV12: y 30 m (98.425 ft) - Length of cable 4 : y 10 m (32.808 ft) g Line polarization active. b Line termination - Total length of cables between isolation boxes 1 : y 1000 m (3280.840 ft) - Length of drop cables 4 or 5 : y 10 m (32.808 ft) g Line polarization active. b Line termination (1) Box powered by the logic controller. g b b g b (1) b (1) Master M241 / M251 TeSys U Altivar 12 Altivar 312 Slave M221C Phaseo power supply Power meter XBTN OTB 3rd-party Modbus slave References Tap-off and adaptor components for RS 485 serial link Designation Description Item Length Unit reference Weight kg lb T-junction and isolation box Screw terminals for trunk cable 2 x RJ45 for tap-off v Isolation of the RS 485 link (1) v Line termination (RC 120 & , 1nF) v Line pre-polarization (2 R 620 & ) v 24 V c power supply (screw terminals) or 5 V c power supply (via RJ45) v Mounting on 35 mm (1.378 in.) 5 1 TWDXCAISO 0.100 0.220 T-junction box 1 x RJ45 for trunk cable 2 x RJ45 for tap-off v Line termination (RC 120 & , 1nF) v Line pre-polarization (2 R 620 & ) v Mounting on 35 mm (1.378 in.) 5 2 TWDXCAT3RJ 0.080 0.176 (1) Line isolation recommended for line distances > 10 m (32.808 ft). Modicon M241 logic controllers Serial links Modbus protocols, character mode Presentation, description, schemes, references TWDXCAISO TWDXCAT3RJ

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