150 MPA2C3 Installation Guide
Maximum Output Loading of Power Supply
Use the following guidelines unless you are using Power over Ethernet (PoE+). A
maximum current capacity of 3000 mA @ 12±2 VDC is available for all external
devices combined when the unit is powered by PSU.
• Maximum current for reader port is 500 mA per door (= 2 Reader Connections).
• Maximum current for relay outputs at self-wetted contact is 750 mA per door (=
2 Relay connections).
• Door
• 1: Rel1/RelAUX1 (for MPA2C3-4, RelAUX1 = Door 3)
• Door
• 2: Rel2/RelAUX2 (for MPA2C3-4, RelAUX2 = Door 4)
• Maximum charge current for the battery wired in series is 128 mA.
• External power is limited to 500 mA/12±2 VDC per AUX Output (2X).
• RS-485
• Interface bus power is limited to 500 mA/12±2 VDC.
Note: You can find the power consumption amounts of devices by referring to the products’
documentation or by using a current meter.
Output Voltage Range at Input
interface (12V)
DrCnt Door 1-4,
Rex Door 1-4,
Aux Inputs IN 9-16
10VDC ~ 14VDC
Max output current at input
interfaces (12V)
500mA
RS485 BUS interfaces
Voltage range at RS485 busses RS485 BUS I/O devices @ RJ45,
RS485 BUS I/O devices @ screw
terminal block,
RS485 BUS Downstream @ RJ45
10VDC ~ 14VDC
Max output current at RS485 bus I/O
devices
RS485 BUS I/O devices @ screw
terminal block
500mA in total for RS485 Modulbus
combined over RJ45 and screw terminal
block RJ45, limited to 500mA
RS485 BUS I/O devices @ RJ45
Max output current at RS485 bus
Downstream
RS485 BUS Downstream @ RJ45 500mA in total for RS485 Modulbus
combined over both RJ45
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