34 Specifications
Saturation Voltage vs. Load Current:
this is the typical voltage (at room temperature) mea-
sured between the
COM
terminal and
P1
,
P2
, or
P3
when the optoisolator is on (conduct-
ing). Ideally, this voltage would be zero, but instead, it varies with the load current.
10
100
1000
0.01
0.1
1
10
O
p
to
is
o
la
to
r
Saturation Vce
(m
il
li
v
o
lts
)
Optoisolator Current (mA)
Figure 13: Optoisolator Saturation Voltage vs. Load Current
Output Rise Time (microseconds):
approximately
Rpullup / 100
, where
Rpullup
is the pull-
up resistor value (in ohms) and the pull-up voltage is 5 Vdc. Rise time is defined as the time
for the output voltage to rise from 20% to 80% of the pull-up voltage.
Output Fall Time:
approximately 2-3 microseconds with a 5 Vdc pull-up voltage.
Option SSR Outputs:
Isolation:
5000 Vac RMS
Breakdown Voltage:
±60 Vdc or 40 Vac; can switch positive, negative or AC voltages
Maximum Leakage (Off) Current:
1000 nA (1 μA)
On Resistance:
1.0 to 2.5 Ω
Maximum Load Current:
500 mA
Output Turn On Time (milliseconds):
1.8 ms typical, 5.0 ms maximum
Output Turn Off Time (milliseconds):
0.5 ms typical, 2.0 ms maximum
Maximum Recommended Pulse Frequency:
30 Hz
Electrical
Power Consumption:
The following table shows typical power consumption and power factor
values with all three phases powered at nominal line voltages. The power supply draws
most of the total power consumed, while the measurement circuitry draws 1-10% of the total
(6-96 milliwatts per phase, depending on the model). Due to the design of the power supply,
WattNode meters draw slightly more power at 50 Hz.
