Gamry Reference 3000 - Appendix C - Misc I;O Connector

Appendix C -- Misc I/O Connector--
13 - 1
Appendix C -- Misc I/O Connector
This connector contains a number of signals, used to interface the Reference 3000 to external apparatus. It is
the miniature 15 pin female D shaped connector on the rear panel of the Reference 3000. Be careful, the
ground pins on this connector are not the Reference 3000 floating ground.
The metal shell of the D-connector is connected to the Reference 3000's Floating Ground. Improper User I/O
connections can damage an Reference 3000 that is connected to a high energy cell containing earth grounded
terminals.
The auxiliary analog output, derived from a D/A converter, is on this connector. The scaling is normally 1 mV
per bit, for a 0 to 4.096 volt full-scale range.
The pin out of this connector is shown in Table C-1.
Table C-1
Miscellaneous I/O Connector
Pin Name Use
1 Analog Output High The auxiliary output signal (DAC output).
2 Analog Output Low The auxiliary output ground connection (ground)
3 Sync In Used in slave mode – starts data acquisition
2.2 kΩ input impedance
4 Sync Out A TTL pulse output before the start of a data point
330 Ω output impedance
5 no connection
6 Ground Digital ground
7 Digital Out 0
A TTL compatible digital output- 330 Ω output impedance
8 Digital Out 1
A TTL compatible digital output- 330Ω output impedance
9 Digital Out 2
A TTL compatible digital output- 330Ω output impedance
10 Digital Out 3
A TTL compatible digital output- 330Ω output impedance
11 Digital In 0
A TTL compatible digital input- 2.2 kΩ input impedance
12 Digital In 1
A TTL compatible digital input- 2.2 kΩ input impedance
13 Digital In 2
A TTL compatible digital input- 2.2 kΩ input impedance
14 Digital In 3
A TTL compatible digital input- 2.2 kΩ input impedance
15 +5 Volts Power- 50 mA maximum current
Caution
Floating operation of Reference 3000 can be compromised by improper cabling to the
User I/O Connector. Do not use standard 15-pin shielded cables with this connector.
Custom cables with the shield connected to pin 6 of the D-connector are required.