DL communication module:
DL communication module:
This module makes it possible for the remote terminal unit to communicate via Private link (in V23/V23R modulation) with one or several
devices.
: Common
• L1: Private link
• L2: Private link
Connection as Private link:
Example Multipoint Link:
Technical specifications
- Cable:
- Use a ‘1 pair’ cable , SYT+ AWG24 ∅ = 5/10
ths
(100Ω resistance per kilometre)
- Connect the cable shielding to the Ground on one side only.
- A ‘bus’ network topology is required: no looping or star structure configurations.
- The unit can communicate with 20 MODBUS devices maxim
um, distributed evenly over a maximum
distance of 15 km.
- The branches of the Multipoint link must be as short as possible and the 2 devices at the start and end
of the link must be configured as ‘Ends of Line’.
LS surge arrester
LP link
Maximum bus length = 15 km
(Wiring used: SYT+ AWG24, 0.203 mm² cross-section)
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