Gamry Reference 600+ - Certificate of Conformance

Misc. I/O Connector
73
Appendix C: Misc. I/O Connector
The Misc. I/O connector contains a number of signals used to connect the Reference 600+ to external
apparatus. It is the miniature 15-pin female D-shaped connector on the rear panel of the Reference 600+.
Be careful: the ground pins on this connector are isolated from both the Reference 600+ floating ground
and earth ground.
The metal shell of the D-connector is connected to the Reference 600’s Floating Ground. Improper Misc.
I/O connections can damage a Reference 600+ 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 V full-scale range.
The pin-out of this connector is shown in Table C-1.
Table C-1
Misc. I/O Connector Pins
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; 330 Ω output impedance
9
Digital Out 2
A TTL-compatible digital output; 330 Ω output impedance
10
Digital Out 3
A TTL-compatible digital output; 330 Ω 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 V
Power: 50 mA maximum current
Caution: Floating operation of the Reference 600+ can be compromised by
connecting improper cables to the Misc. I/O Connector. We do not recommend use of standard 15-
pin shielded cables with this connector. Custom cables with the shield connected to pin 6 of the D-
connector are preferred.