GE PQMII, Instruction Manual

Page: 15 / 216

CHAPTER 1: OVERVIEW
PQMII POWER QUALITY METER – INSTRUCTION MANUAL 1–7
1.3 Optional Features
1.3.1 Transducer Input/Outputs
Four isolated 4 to 20 mA (or 0 to 1 mA depending on the installed option) analog outputs
are provided that can replace up to eight transducers. The outputs can be assigned to any
measured parameters for direct interface to a PLC.
One 4 to 20 mA analog input is provided to accept a transducer output for displaying
information such as temperature or water level.
An additional rear RS485 communication port is provided for simultaneous monitoring by
process, instrument, electrical, or maintenance personnel.
FIGURE 1–4: Additional Communication Port
1.3.2 Control Option
An additional three dry-contact form “C” output relays and four dry-contact switch inputs
are provided. These additional relays can be combined with setpoints and inputs/outputs
for control applications. Possibilities include:
• undercurrent alarm warnings for pump protection
• overvoltage/undervoltage for generators
• unbalance alarm warnings to protect rotating machines
• dual level power factor for capacitor bank switching
• underfrequency/demand output for load shedding resulting in power cost saving
• kWh, kvarh and kVAh pulse output for PLC interface
• Pulse input for totalizing quantities such as kWh, kvarh, kVAh, etc.