GE PQMII, Instruction Manual, Page: 195 / 216

CHAPTER 7: APPLICATIONS
PQMII POWER QUALITY METER – INSTRUCTION MANUAL 7–25
FIGURE 7–4: Multiple Metering Locations
Various operating parameters must be taken into account. The PQMII Switch Inputs
require a minimum 100 ms operation time to be detected. Therefore the Pulse Output
Width should be equal to or greater than 100 ms. The duration of the contact operation
can be indefinite. The internal Switch Input circuit of the PQMII is switched on and off at the
times when the PQMII is reading the Switch Inputs status. Monitoring the input to one of
the PQMII Switch Inputs will reveal a pulsed 24 V DC waveform, not a constant signal.
Standard wiring practice should be adhered to when making connections to the PQMII
Switch Inputs, i.e. avoiding long runs of cable along current carrying conductors or any
other source of EMI. An induced voltage on the Switch Input can cause malfunction of the
Switch Input.
M
L L
PQM
II
#1
PQM
II
# 2
PQM
II
#3
F1 F 2 F3
M
F4
A U X1 A U X1 A U X1
CO M CO M CO M
41 41 41 4 2 4 2 4 2
N/ O N/ O N/ O
A
U
X1
CO
M
41
4
2
N/
O
PQM
II
#4
+
2
4V
DC
SW
1
SW2 SW
3
SW
4
33 3 2 31 3 0 29