Installation Guide SMX-AUS
16 NS-MN-0030 / 11.2020
• External Power Connection
- Receives power from an internal power supply unit.
For the internal power supply details, refer to Chapter 2.5.1.
- The external mains supply cable must be terminated at the Mains Termination Block (MTB) located on the
bracket.
- The incoming power cable Ground or Earth (green/yellow) wire must be connected to the MTB earth connection
(middle terminal).
- Connect the Neutral (blue) wire to the Left terminal (marked as Neutral in the figure) and connect the Phase or
Live (brown) wire to the right terminal (marked as Line in the figure). The MTB has an integral fuse.
Fig. 9: External Power Connection
THE MAIN POWER INPUT WIRE CANNOT USE CABLE GLAND.
3.2 Real-time Clock with battery
During a total power loss, a 3 V button cell (CR2025) lithium battery on the CPU provides backup for the CPU’s on-board memory for real-time clock retention.
This battery’s shelf-life is more than 10 years. To replace the lithium battery:
1. Make a full backup of all the system settings to prevent loss of all programming data.
2. Disconnect all the power sources.
3. Remove the battery from under clip (use fingers, because screwdriver could damage the components) and insert new battery.
THE BATTERY USED IN THIS DEVICE MAY PRESENT A RISK OF FIRE OR CHEMICAL BURN IF MISTREATED. DO NOT RECHARGE, DISASSEMBLE, HEAT
ABOVE 60°C, OR INCINERATE. REPLACE THE BATTERY WITH
CR2025 3 V ONLY. USE OF ANOTHER BATTERY MAY PRESENT A RISK OF FIRE OR
EXPLOSION.
4. Dispose of the used battery promptly. Keep away from children. Do not disassemble and do not dispose of in fire.
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