Zeiss humphrey HFA II-i series, Руководство по обслуживанию на месте

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Humphrey Field Analyzer II - i Appendix B
Confidential and Proprietary
52235C1105 B - 3
Field Service Guide
B.2 RS-232 Interface Hardware and Pin Assignments
NOTE: Carl Zeiss Meditec provides this information as a courtesy to
our customers, and for the use of authorized Service personnel. Carl
Zeiss Meditec does not assume any responsibility for interfacing or
providing software to the customer for use of the RS-232 interface with
non-Carl Zeiss Meditec external devices.
The RS-232 interface connectors on the HFA II - i are DB-9F 9-pin sockets. This
requires a Cannon DB-9P, or equivalent, mating connector on the interface cable.
For reliable data transfer, the interface cable length should be kept as short as
possible. Maximum length allowed is 50 feet.
The pin assignments at the HFA II - i RS-232 output port are detailed below.
Pin 1 - Data Carrier Detect
(Input) No Connection.
Pin 2 - Received Data (RX)
(Input) Used to receive data from the external system.
Pin 3 - Transmitted Data (TX)
(Output) Used to transmit information asynchronously using ASCII code.
The data format, comprising data bits, parity, and stop bit(s), is determined by
user-defined selections. The output goes from -12 volts to +12 volts, in the
form of pulses, depending on the data being transmitted.
Pin 4 - Data Terminal Ready (DTR)
(Output) Is connected internally with pin 7 (RTS). Both signals are TRUE
whenever the instrument is powered up and ready for operation.
Pin 5 - Signal Ground (GND)
Ground reference for the electronic circuits.
Pin 6 - Data Set Ready (DSR)
(Input) (no connection)
Pin 7 - Request To Send (RTS)
(Output) Is connected internally with pin 4 (DTR). Both signals are TRUE
whenever the instrument is powered up and ready for operation.
Pin 8 - Clear To Send (CTS)
(Input) This signal must be TRUE to enable output transmission from the
HFA II - i . This signal is usually set to TRUE permanently, or in response to
"Request To Send" when the external data system's receive circuit is ready.
Pin 9 - Ring Indicator (RI)
(Input) (no connection)