MI00597-0-EN
INSTALLATION MANUAL
4/4
ELECTRICAL CONNECTIONS
Z-8TC-SI
Z-8TC-SI-LAB
Power supply and Modbus interface are available using the Seneca DIN rail bus, via the IDC10 rear connector, or the Z-PC-DI-
NAL-17.5 accessory.
RS485 GND
RS485 A
RS485 B
Power Supply AC / +
Power Supply AC / -
IDC 10
1
Back connector (IDC 10)
The illustration shows the meanings of the various IDC10 connector
pins if signals are to be sent via them directly.
To meet the electromagnetic immunity requirements:
- use shielded signal cables;
- connect the shield to a preferential instrumentation earth system;
- separate shielded cables from other cables used for power installations (transformers, inverters, motors, etc.).
INSTALLATION REGULATIONS
MODBUS CONNECTION RULES
The module has been designed for vertical installation on a DIN 46277 rail. For optimal operation and long life, adequate ventila-
tion must be provided. Avoid positioning ducting or other objects that obstruct the ventilation slots. Avoid mounting modules over
heat-generating equipment. Installation in the bottom part of the electrical panel is recommended.
These are open type devices intended for installation in a final casing/panel that offers mechanical protection and protection
against the spread of fire.
1) Install the modules in the DIN rail (120 max)
2) Connect the remote modules using cables of an appropriate length. The following table shows cable length data:
-Bus length: maximum length of the Modbus network according to the Baud Rate. This is the length of the cables that connect
the two farthest modules (see Diagram 1).
-Derivation length: maximum length of a derivation 2 m (see Diagram 1).
Lunghezza
bus
Lunghezza
derivazione
1200 m
2 m
Schema 1
Modulo 2
Modulo 1
Modulo 3
Modulo 4
Modulo 5
Lunghezza del Bus
Ld= Lunghezza derivazione
Ld
For maximum performance, it is recommended to use special shielded cables manufactured specifically for RS485 communication.
Bus length
Derivation
length
Module 1
Module 2
Module 5
Module 4
Module 3
Diagram 1
Bus length
Ld= Derivation length
CAUTION
CAUTION
