Gamry Instruments Interface 1000, Руководство оператора

Страница: 72 / 88

Appendix C : I/O Connectors--Sync Port
Appendix C - 2
Sync Port
The Sync Port is used to interconnect Interface 1000s that must be operated synchronously: with a single clock
and with simultaneous data acquisition. The sync connector is a 7-pin mini-DIN connector on the rear panel of
the Interface 1000.
Gamry’s synchronization system uses the terms Master and Serf as defined below.
Master: The Master potentiostat provides the clock signal used for all potentiostats and provides data
acquisition pulses used to control the timing of A/D conversion. All synchronous multiple potentiostat systems
have only one Master.
Serf: A Serf potentiostat gets its timing information from a Master potentiostat. A multiple potentiostat system
can have up to seven Serf potentiostats all controlled by one Master.
A special cable is used to connect the instruments that are synchronized. The cable has a Master connector on
one end and a variable number of Serf connectors.
Gamry sells three standard Master-Serf cables:

985-00132 One Master and One Serf

985-00133 One Master and up to Three Serfs

985-00134 One Master and up to Seven Serfs
All of these cables have the Master end of the cable identified by a large M on the DIN connector. Note that a
cable can be used with some instruments missing, so the eight instrument Master-Serf cable can be used for
one Serf, two Serfs, three Serfs,..., seven Serfs.
The Master-Serf connection scheme sends a 24 MHz complex clock signal from the Master to the Serfs using a
daisy-chained low-voltage differential signal (LVDS). Data-acquisition pulses are embedded in the clock signal.
DC pins in the DIN connector are used to detect all cable connections, and, most importantly, detect the
Master end of the cable.
We recommend that you always plug the Master and last Serf ends of the cable into a
potentiostat. You may leave the DIN connectors in the middle of the cable disconnected.
Use only Gamry-supplied cables for all Master-Serf synchronized systems. The cable uses a
differential pair that requires controlled impedance, making user-construction of a cable very difficult.