ITR MUPASZ 710 plus - 4.2. Modem 2 x RS-485

User manual
IU_M710P_MANUAL_05i00_ENG Strona 33 z 36
4.2. Modem 2 x RS-485
Depending on device position in RS-485 network, following types of wiring of communication ports are used:
Type I (2-wire)
Fig. 4.2.1. Intermediate position of the device in 2-wire communication network
Type II (2-wire)
Fig. 4.2.2. Extreme position of the device in 2-wire communication network
It is recommended that shielded twisted pair is used, with characteristic impedance 120 and low wire-to-
wire capacity, with additional wire equalizing potentials of individual transmission modules. One end of
shielding wire should be connected with protective potential of the system.