Siemens 9700, Installation Instructions Manual, Page: 16 / 45

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Field Service Considerations
If the 9700 Power Meter requires servicing or field upgrading, you may need
to disconnect and remove the unit from its mounting. The initial installation
should be done in a way which makes this as convenient as possible:
♦
All phase voltage sense leads should be protected by breakers or fuses
at their source such that the 9700 Power Meter can be safely
disconnected.
♦
A CT shorting block should be provided so that the 9700 Power Meter
current inputs can be safely disconnected without open circuiting the
CT’s. The shorting block should be wired so that protective relaying is
not affected.
♦
All wiring should be routed to allow easy removal of the connections to
the 9700 Power Meter terminal strips, the 9700 Power Meter cover, and
the 9700 Power Meter itself.
♦
If control relays are used with the external I/O modules, there should be
a bypass mechanism installed.
Terminal Strips
All connections to the 9700 Power Meter base unit are made to terminal
strips and cable headers at either side of the unit. The terminal strip for
phase
voltage/current
and
supply power input
is a barrier-type for which
ring or spade terminals may be used to simplify connection. The
status/auxiliary input
terminal strip and communications terminal strip are
both captured-wire type that accept stripped wire ends.
The terminal strip labels for phase voltage/current, power supply and serial
communications differ slightly depending on the power supply option used:
4FEWMGQSHIP
POWER VOLTAGE INPUTS CURRENT INPUTS
42 41 31 32 22 21 12 11
V
3
V
2
V
1
V
ref
N L
COMMUNICATIONS
RS-232C RS-485
R
T
S C
T
S S
G T
X
D R
X
D + - S
H
L
D
3 3
-
+
4STXMSR
POWER
VOLTAGE INPUTS CURRENT INPUTS
42 41 31 32 22 21 12 11
V
3
V
2
V
1
V
ref
COMMUNICATIONS
RS-232C RS-485
R
T
S C
T
S S
G T
X
D R
X
D + - S
H
L
D
3 3
-
+