PACSystems RX3i - Terminal Assembly; Connectors

User Manual Chapter 1
GFK-2749A Jan 2020
PSM Module Description and Specifications 3
RUN
Green
The module is operating correctly and communicating with the
RX3i.
Red
The module is operating without backplane communication.
Off
The module is not operating.
FLT
Green,
blinking
During the period when GREEN is ON, Grid 2 can be connected to
Grid 1.
Green,
steady
Grid 1 and Grid 2 can be connected and there are no faults.
Red
The module has detected a fault condition.
Off
The module has not detected a fault and the grids are not
synchronized.
GRID 1
Green
Indicates a voltage signal has been detected on Grid 1.
Red
A frequency out-of-range condition has been detected on Grid 1.
Off
No zero-crossing signal of Grid 1 has been detected during the
last 250 ms time period.
GRID 2
Green
Indicates a voltage signal has been detected on Grid 2
Red
A frequency out-of-range condition has been detected on Grid 2.
Off
No zero-crossing signal of Grid 2 has been detected during the
last 250 ms time period.
1.3 Terminal Assembly
The Terminal Assembly accepts three voltage inputs and four current inputs for each of two
grids. The Terminal Assembly translates the 0–5 A current signals and the 45–690 VAC RMS
voltage signals to low voltage signals for use by the PSM module.
Voltage inputs are connected through external, user-supplied potential transformers (PT).
External, appropriately-sized current transformers (CT) are used to translate grid or load
currents down to the 0–5 A range required by the Terminal Assembly.
1.4 Connectors
The Terminal Assembly provides two terminal blocks, each with 12 screw terminals, for the
voltage and current inputs from the grids. The terminals accept up to 10 AWG wire
commonly used in power utility applications.
The Terminal Assembly provides two pairs of Mini-D 20-pin connectors for connection to
the PSM module using the interface cables. The 45–120 VAC or 120–690 VAC range is
selected by connecting the interface cables to the corresponding pair of Mini-D connectors.
When the cables are connected to the correct grid and matching voltage ranges, the PSM
module provides an indication that the cables are correctly attached to the unit.