Extension for Modbus RTU (additional board) Discovery Board DK-NP5-4A is equipped with an additional board for communication via Modbus RTU (RS485). Dimensioned drawings – Modbus RTU additional board Dimensions are in [mm]. Hardware overview – Modbus RTU additional board Name Function Note X2 Modbus RTU IN X3 Modbus RTU OUT X4 Connection to Discovery Board NP5 SW1 Reserved SW2 Reserved SW3 Switch for 150 Ω termination resistor Pin 1 150 Ω termination resistor (switch set to ON) Pin 2 Reserved PIN Function Note 1 n.c. 2 n.c. 3 n.c. 4 D1 (RS-485 +) 5 D0 (RS-485 -) 6 n.c. 7 n.c. PIN 7 on X2 is internally connected to PIN 7 on X3 8 Common Common signal and supply
Extension for Modbus RTU (additional board) Discovery Board DK-NP5-4A is equipped with an additional board for communication via Modbus RTU (RS485). Dimensioned drawings – Modbus RTU additional board Dimensions are in [mm]. Hardware overview – Modbus RTU additional board Name Function Note X2 Modbus RTU IN X3 Modbus RTU OUT X4 Connection to Discovery Board NP5 SW1 Reserved SW2 Reserved SW3 Switch for 150 Ω termination resistor Pin 1 150 Ω termination resistor (switch set to ON) Pin 2 Reserved PIN Function Note 1 n.c. 2 n.c. 3 n.c. 4 D1 (RS-485 +) 5 D0 (RS-485 -) 6 n.c. 7 n.c. PIN 7 on X2 is internally connected to PIN 7 on X3 8 Common Common signal and supply
Hardware overview – Modbus RTU additional board Name Function Note X2 Modbus RTU IN X3 Modbus RTU OUT X4 Connection to Discovery Board NP5 SW1 Reserved SW2 Reserved SW3 Switch for 150 Ω termination resistor Pin 1 150 Ω termination resistor (switch set to ON) Pin 2 Reserved PIN Function Note 1 n.c. 2 n.c. 3 n.c. 4 D1 (RS-485 +) 5 D0 (RS-485 -) 6 n.c. 7 n.c. PIN 7 on X2 is internally connected to PIN 7 on X3 8 Common Common signal and supply
