KMS Simplekey 4 - Lock 1 and Lock 2 (Outputs) Maximum 2 A supply; PSU; Battery

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Lock 1 and Lock 2 (Outputs) Maximum 2A supply.
0V
Spare 0v connection — use as return for inputs.
-V
Switched 0v from the lock — energises the lock when switched on.
+V
Constant 12v supply. A load of 50mA or greater is required for a multi-meter to
read this accurately.
PSU
+VE
+12v DC from power supply module (up to 5A).
-VE
0v (floating relative to earth).
Battery
+VE
+12v, 7Ah lead acid battery (e.g. Yuasa NP7-12FR).
-VE
0v.
Note: The Simplekey 4 System Controller does not provide a battery
charging facility, this terminal is for the connection of a battery only.
If battery backup is required a suitable alternative for charging of
the battery is required, contact KMS Technical Support for further
information.