Guodian Nanjing Automation PSV400 Digital Measurement and Control Device

I. Functions
1. Grounding Alarm
2. 4~20mA Output
3. U, 3U0, 11-Channel Switching Value Acquisition
II. Principle Description
2.1 Grounding Alarm
For ungrounded systems, the device calculates the zero-sequence voltage 3U0 based on UA, UB, and UC. If 3U0 exceeds the set value, the device will issue an alarm signal.
2.2 4-20mA DC Output
The device outputs a 4-20mA DC signal via terminals (41, 42) for connection to the analog input module (AI) of a DCS system. This DC output option can be configured in the "Device Settings" menu as Ia, Uab, or P. The parameter "4-20mA Maximum Value" is settable. For example: if P is selected and the "4-20mA Maximum Value" is set to 1000, the device outputs 20mA when P=1000W; if P is selected and the "4-20mA Maximum Value" is set to 866, the device outputs 20mA when P=866W.