2.6.4.1 Power Supply
As soon as the power supply of the Processor Module (CPU) is higher than the minimum
Process and supply voltage (see
Ä
Chapter 2.6.1.1 “Environmental Conditions” on page 1248),
the power supply detection is activated and the Processor Module is started. Power supply of
Processor Module and I/O modules should be powered on the same time, otherwise the Pro-
cessor Module will not switch to run after startup.
When during operation the power supply is going down lower than the minimum Process and
supply voltage (see
Ä
Chapter 2.6.1.1 “Environmental Conditions” on page 1248) for more than
10 ms, the Processor Module is switched to safety mode (display shows “AC500”). A restart of
the Processor Module only occurs by switching the power supply off and on again.
If an I/O module is disconnected during normal operation from power supply while Processor
Module is still powered, the Processor Module will continue its normal operation on all other
powered peripherals (I/O modules, communication modules and communication interfaces), but
freezes the input image. After recovery of I/O Module power supply it will continue normal oper-
ation and inputs and outputs were updated.
Logic Controller Supply: AC500 logic controller power supply is provided through terminals L+ /
M.
Process Power Supply: S500 process power supply is provided through terminals UP / ZP.
Logic Controller Supply is galvanic isolated from Process Power Supply.
As system power supply for AC500/S500, the ABB CP power supply series can be used.
2.6.4.1.1 Power Supply for Processor Modules
The supply voltage of 24 VDC is connected to a removable 5-pin terminal block. L+/M exist
twice. It is therefore possible to feed e.g. external sensors (up to 8 A max. with 1.5 mm
2
con-
ductor) via these terminals.
Pin Assignment Label Function Description
Terminal block
removed
Terminal block
inserted
L+ +24 VDC Positive pin of the
power supply voltage
L+ +24 VDC Positive pin of the
power supply voltage
M 0 V Negative pin of the
power supply voltage
M 0 V Negative pin of the
power supply voltage
FE Functional earth
2.6.4.2 Terminals for Power Supply and the COM1 Interface
Number of cores per ter-
minal
Conductor type Cross section
1 Solid 0.08 mm² to 1.5 mm²
1 Flexible 0.08 mm² to 1.5 mm²
1 with wire end ferrule
(without plastic sleeve)
Flexible 0.25 mm² to 1.5 mm²
1 with wire end ferrule (with
plastic sleeve)
Flexible 0.25 mm² to 0.5 mm²
1 (TWIN wire end ferrule) Flexible 0.5 mm²
AC500 System
Power Supply
Pin Assignment
Terminal type:
Spring Terminal
System Assembly, Construction and Connection
AC500 (Standard) > Connection and Wiring
2019/04/17 3ADR010121, 13, en_US 1273
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