Supply Voltage Limiting Requirements - Honeywell SmartLine ST 700 User Manual

4.6.6 Supply Voltage Limiting Requirements

If your transmitter complies with the ATEX 4 directive for self-declared approval per 94/9EC, the
power supply has to include a voltage-limiting device. Voltage must be limited such that it does not
exceed 42V DC. Consult the process design system documentation for specifics.
ST 700 SmartLine Pressure Transmitters User's Manual
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