G16 Smoke Density Monitor
Ver.2.4 – Revision March 2022 23
5.3 Electrical Connections
5.3.1 Control and Monitoring Unit
The control and monitoring unit is arranged with touch screen and connection terminals
inside the unit. Five (5) cable glands (M20) are arranged for incoming and outgoing power
and data cables. The M20 cable glands are suitable for cables diameter between 7 mm to
13 mm.
Before connecting the power supply, please make sure that the power supply rating for the
control and monitoring unit corresponds with the power supply available.
Please see the electrical drawings in section 10.2. The system can be prepared for functions
not relevant for all installations. Only the functions to be used shall be connected.
The termination resistors 120 Ω - part no. 03261 provided with the control and moni-
toring unit and the optional junction box are to be installed according to the actual
installation. Please refer to the electrical drawings for the details instructions.
5.3.2 Junction box (optional)
The connection terminals are located in the junction box. Four (4) cable glands (M20) are
arranged for incoming and outgoing power and data cables. The M20 cable glands are
suitable for cables diameter between 7 mm to 13 mm.
Please see the electrical drawings in section 10.2. The system can be prepared for functions
not relevant for all installations. Only the functions to be used shall be connected.
5.3.3 Cable types
The recommended minimum cable sizes are as follows:
Power supply: 3 × 1.5 mm² shielded cable
Data cable: 2 × 1.0 mm² twisted pair shielded cable
Alarm cable: 4 × 1.0 mm² shielded cable
Analog Output 2 × 1.0 mm² twisted pair shielded cable
Network communication: Category 6e cable
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