Installation guide

Site Requirements

890USE17100 September 2003

Power Supply Selection

Overview In an Advantys island there are at least three connections that need to be supplied

power by an external source:

Logic power connection (to the NIM)

Actuator power connection (to a PDM)

Sensor power connection (to a PDM)

Source power for these can come from one, two or three supplies. Your

requirements are dictated by:

Field devices

Voltage and current needs

Isolation requirements

EMI/RFI suppression needs

CE compliance needs

Cost limitations

The AC voltage for AC PDMs is 85 VAC to 264 VAC

Logic Power You need to supply 24 VDC to your NIM. It converts the 24 VDC to 5 VDC for logic

power across the island bus. Beginning of segment (BOS) modules on additional

segments of your Advantys island need to be supplied their own 24 VDC for logic

power, either from the same supply or an additional one. Either way the supplies that

you select for logic power must have a low voltage limit of 19.2 VDC and a high

voltage limit of 30 VDC.

CAUTION

IMPROPER GALVANIC ISOLATION

The power components are not galvanically isolated. They are intended

for use only in systems designed to provide SELV isolation between the

supply inputs or outputs and the load devices or system power bus. You

must use SELV-rated supplies to provide 24 VDC source power to the

island

Failure to follow this precaution can result in injury or equipment

damage.