System Power Consideration
A PointMax I/O system uses the following types of power:
- Module Power (MP)
- Backplane power (BP)
- Sensor Actuator (SA) power
- Local Actuator (LA) power
Power Distribution Example – 5034-AENTR with 5034-EXP and 5034-MBSA
Power Distribution Example – 5034-AENTR with 5034-MBSA and 5034-IA8
Module Power (MP)
MP power is required in a PointMax I/O system.
PointMax EtherNet/IP adapters provide power to a PointMax I/O system via an adapter
RTB that is connected to an external power supply and installed on the adapter. The
adapter RTB provides module power (MP+/-) to the system. Module power refers to
system-side power that is used to operate the PointMax I/O system.
- You must limit the MP power source to 18...30V DC. The rated current should be at least 850 mA (maximum limit of 10 A). The inrush current handling capability should be at least 6 A for 10 ms.For more information, see Switched Mode Power Supply Specifications Technical Data, publication 1606-TD002.
- You must use SELV-listed or PELV-listed power supplies for MP power.
Backplane Power (BP)
The backplane power is generated from module power by the adapter and expansion
power. It internally powers the I/O modules in the system. The adapter can supply
power to a maximum of 16 I/O modules. To extend support for an additional 16
modules, use a 5034-EXP or 5034-EXPXT expansion power.
Sensor Actuator (SA) Power
SA power is field-side power that is connected to the adapter, 5034-MBSA mounting
base, or 5034-EXP module. It powers devices that are connected to the I/O
modules.
- You must limit the SA Power source to 10 A, max, at 18...30V DC.For more information, see Switched Mode Power Supply Specifications Technical Data, publication 1606-TD002.
- You must use SELV-listed or PELV-listed power supplies for SA power.
- You must connect SA power for safety I/O modules to provide the required safety function.
Local Actuator (LA) Power
LA power is the field-side power that is connected to the 5034-RTB18/RTB18S on the
PointMax digital AC modules. It supplies power to devices (actuators) that are
connected to the I/O modules.
- You must limit the LA power source based on the specific module requirements.For information on module requirements, see PointMax I/O System Specifications Technical Data, publication 5034-TD001.
- In AC mode, the LA power source must operate within a frequency range of 47…63 Hz.
- We recommend that you connect a minimum load to the output of the 5034-OA4/XT module during the off-state.
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