PSL PQube - PQube Overview and Calibration; PQube Connections and Controls Overview; Safety: Disconnect Mains Before Servicing; PQube Calibration Information

PQube User Manual 2.1
Page 27 of 113
Overview of connections and controls
A
Battery compartment latch
I
USB port. Optically isolated from local earth.
Factory use for Rev 1.2 firmware; user access in free
future firmware upgrades.
B
SD memory card and adjacent LED
J
Digital input. 60-volt tolerant. 1.5-volt threshold.
Wetted with 5.4V at 3 microamps.
C
Select button
K
Power inputs. 24VAC, or 24VDC to 48VDC (either
polarity) nominal. 15VA max.
D
Joystick. Click like a button to return to
main menu.
L
Earth – functional. Used as the reference voltage.
E
Heartbeat LED
M
Analog inputs. Maximum ±60V to earth. Can be used
as differential inputs.
F
Temperature/humidity probe inputs.
Optically isolated from local earth.
N
Signal relay outputs. One is standard on all PQubes.
Two more signal relay outputs are available as a
factory-installed RLY option.
G
L1, L2, L3 voltage inputs. 690Vrms max
phase-to-phase (equivalent to 400Vrms
phase-to-earth)
P
Relay contact output rated at 30VAC, 60VDC, 2 amps,
- included in factory-installed RLY option.
H
Neutral terminal – optional connection
Disconnect mains prior to servicing
Always disconnect all mains connections, and verify disconnections, prior to servicing.
Calibration Information for Your PQube
Every PQube is calibrated and traced to NIST at the factory. You can download a free NIST trace
certificate that contains the specific calibration information for your PQube by entering your
PQube’s serial number at www.powerstandards.com/CalibCerts.htm.