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Monitor Connector
The Monitor connector is located on the Interface 1000 Front Panel. It is an 8-pin round mini-DIN connector.
One possible mating connector is from CUI Inc. part number MD-80. The pin-out signals of the Monitor
Connector are provided in Table C-2.
Pin
Name
1
Unreg +5 V
2
Signal Ground
3
Power Ground
4
Signal Ground
5
E_sig
6
EXT_SIG
7
I_Sig
8
Signal Ground
I Monitor Signal
The I Monitor signal represents the output of the Interface 1000 current measurement circuit. It can be treated
as a two-wire differential signal with the negative side connected to the Interface 1000 Signal Ground. With the
exception of the filtering described below, it is the raw signal with no offset or gain applied. The effective
bandwidth of the current signal falls as you reach the nA and pA current ranges. IE Stability capacitors further
slow the response.
Caution:
Floating Ground. Connection signal to an earth-ground-referenced apparatus can compromise the
Interface 1000's ability to float, and invalidate data collected on earth-grounded cells.
Scaling on this signal is 3 V for the nominal full scale current on the selected current range. Cathodic
currents cause a positive output voltage. If the software is auto-ranging the current-range selection, this signal is
discontinuous at each range change.
The I Monitor signal is filtered using an RLC circuit. It has a bandwidth of approximately 150 kHz when
connected to a high-impedance input. This bandwidth is further reduced if a coaxial cable is connected to the
BNC. Its output impedance is approximately 1 kΩ in parallel with 47 pF.
E Monitor Signal
The E Monitor signal is derived from the output of the Interface 1000's differential electrometer circuit. It can
be treated as a two-wire differential signal with the negative side connected to the Interface 1000 Signal
Ground. With the exception of the filtering described below, it is the raw voltage signal, with no offset or gain
applied. With the exception of the filtering described below, it is buffered representation of the voltage
difference between the white and blue cell cable leads.
Appendix C : I/O Connectors--Monitor Connector
Table C-2
Monitor Connector
Use
An unregulated source of +5 V. 10 Ω output impedance.
A very high quality ground. Signals are relative to this ground.
Ground used when active circuits are needed. Power circuits from
Pin 1 to Pin 3.
A very high quality ground. Signals are relative to this ground.
E Monitor Signal
External Signal In
I_Monitor Signal
A very high quality ground. Signals are relative to this ground.
The ground side of the I Monitor signal is connected to the Interface 1000
Appendix C - 3
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