FILE100000529_B_EN-58101538

FILE100000529_B_EN-58101538_D1.pdfBACnet® MS/TP, inputs (In-A, In-B) Cable connections Terminals Max cable size 1.5 mm² MULTICAL® 403 MULTICAL® 603 MULTICAL® 803 Pulse inputs Terminal 65: Pulse In-A(+) Terminal 66: Pulse In-A(-) Terminal 67: Pulse In-B(+) Terminal 68: Pulse In-B(-) Data Terminal 138: RS-485 B/+ Terminal 139: RS-485 GND Terminal 137: RS-485 A/- Pulse inputs The module is equipped with two pulse inputs, In-A and In-B, to collect and + accumulate pulses, e.g. from water and electricity meters. The pulse inputs are physically placed on the module. However, the accumulation and logging of values are performed by the MULTICAL® calculator. When installing a module with pulse inputs in slot 2 of MULTICAL® 603 and + MULTICAL® 803, the pulse inputs will be registered in the meter as In-A2 and In-B2. Data The communication is RS-485 based. To ensure proper communication a twisted shielded pair cable is mandatory. The shield must be connected to the GND Terminal. All devices in the RS-485 system are preferably connected in a line-topology. Communication line to be terminated with 120 Ohm resistors between the A and B wires, in both ends. 65 In-A 66 67 In-B 68 Kamstrup A/S • FILE100000529_B_EN-58101538_D1_09.2023 3Page 2Page 4