Siemens 9700, Installation Instructions Manual, Page: 24 / 45

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Single Phase Connection Diagram
Fuses
2A
V1
V1
V2
V2
V3
V3
LINE
A B N
CT Shorting Switch
or Test Block
CTs
Vref
I1
I11
I12
I2
I21
I22
I31
I32
I41
I42
Neutral current
input is optional.
LOAD
Export
Import Supply Power
(dependent on equipped
power supply option)
Switchgear
Chassis Ground
3 A slow-blow
+
_
L/+
N/-
3 A slow-blow
I3
I4
Connecting the Status Inputs
The 9700 Power Meter provides eight status inputs, S1 to S8. Specifications
are as follows:
Specification Value
Min Pulse Width 1 millisecond
Max Pulse Rate 20 pulses/second
Scan Time 1 millisecond for all inputs (minimum)
Connection
Connections to the status inputs are made via a captured-wire type terminal
block on the 9700 Power Meter. Use a wire size that is appropriate for your
application and complies with local electrical codes.
The 9700 Power Meter uses a current sensing technique to monitor contact
status by providing an internal 30 VDC supply for
self-excitation
. These
inputs can be used for
dry
contact sensing applications, but
not
for voltage
sensing applications. Note that no ground or external voltage connections
are required.
2
38)
Connect the two voltage
phases (each at 180 degrees
with respect to each other) to
the V1 and V2 inputs of the
9700 Power Meter, and the
outputs of the two
corresponding CTs to the I1
and I2 input pairs. V3, I31 and
I32 are unused and should be
grounded.
VOLTS MODE should be set to
SINGLE.
'
%98-32
For this configuration
ONLY, the 208 VAC line-to-
line voltage inputs can be
used with 240 VAC line-to-
line systems.
Contact Siemens Energy &
Automation Customer
Service if you intend to
connect to a single phase
system that differs from
that shown here.