EN
21
The SM61IoT has four communication interfaces:
1. PORT 1 - serial interface:
• purpose - communication with Master device,
•
bus - RS-232, RS-485,
• terminals - 14, 15, 16 (RS-485) and 12, 13, 14 (RS-232),
• galvanically isolated from rest of the system,
• maximum length of bus depends on the speed of transmission
(for high speeds of up to several tens of meters, for small, e. g.
9600 bit/s to about 1.2 km).
2. PORT 2 - serial interface:
• purpose - communication with Slave device,
•
bus - RS-485,
•
terminals - 5,6,7,8,
• galvanically isolated from rest of the system,
• maximum length of bus depends on the speed of transmission
(for high speeds of up to several tens of meters, for small, e. g.
9600 bit/s to about 1.2 km).
3. USB - serial interface:
• protocol of data exchange: Modbus RTU,
• purpose - device configuration,
• connection - mini USB.
4. LAN :
• protocol of data exchange: Modbus TCP,
• purpose - device configuration,
• allow to connect device to Ethernet network (the way of connec
-
tion shown on fig. 4),
• connection - RJ-45.
To connect SM61IoT to Ethernet network it is advisable to
use a twisted-pair cable:
• U/FTP – a twisted-pair cable with each pair on a separate screen
with the film,
• F/FTP – a twisted-pair cable with each pair on a separate screen
in addition to film-screen,
• S/FTP ( formerly SFTP) – a twisted-pair cable with any pair foiled
in addition to the screen mesh,
• SF/FTP ( formerly S-STP) – a twisted pair cable with each pair
twisted foil in addition to film and screen grid.
Summary of Contents for SM61IoT
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