Dual power is a standard requirement for infrastructure being installed in modern data centres, and the IM4200 rack mount console servers all have two internal AC or DC power supplies. Dual power can also be a requirement for remote site management, and this option is available on all the ACM5000-I and ACM5500-I products.
The ACM5004-2-I, ACM5004-2-G-I, ACM5508-2-I and ACM5504-5-G/L-I gateways all have dual power inputs that are diode isolated. They can be powered by:
- Connecting +9V to 30 VDC to DC PWR and GND on the green screw terminal block, or
- Connecting 12VDC from an external AC/DC power supply (supplied with product) – or connecting an external 9 to 24 VAC, or +9V to 30V DC source – to the PWR socket
Alternately the gateway can have both power feeds connected to provide redundancy. There’s no load sharing, as the individual power feed with the slightly higher output voltage will get to carry all the load. So the two power feeds don’t share the load. However it is a “hot standby” solution so if one feed drops or fails the ACM stays powered.
Customers who were seeking such remote site management solutions have included:
- a telco looking for remote generator and fuel level monitoring at their edge POP sites; and required all on-site equipment to have redundant power feeds from the dual 48V DC on site battery supply. They connected the ACMs using two SDC48-12V external DC power adapters.
- a highway construction customer with a network of road-side monitoring locations who used ACM cellular connections for local camera feed and roadsire network status monitoring. While the sites all had mains power feeds, there was a desire for power backup. So the on-site ACMs were also connected to a small solar recharged battery.