Isotech Fast-Cal Series User Manual

Page 21 of 29
Fast Cal Series Iss.07 – 08/13
USING THE PC INTERFACE
The Fast-Cal units include an RS422 PC interface and a special converter cable that allows use with the standard RS232
port. When using the bath with an RS232 port it is essential that this converter cable is used. Replacement cables are
available from Isotech, part number ISO-232-432. A further lead is available as an option, Part Number ISO-422-422
lead which permits up to 5 instruments to be daisy chained together.
The benefit of this approach is that a number of calibration baths may be connected together in a "daisy chain"
configuration - and then linked to a single RS232, see diagram.
Note: The RS 422 standard specifies a maximum lead length of 1200M (4000ft). A true RS422 port will be required to
realise such lead lengths. The Isotech conversion leads are suitable for maximum combined lead lengths of 10M that is
adequate for most applications.
CONNECTIONS
For RS232 use simply connect the Isotech cable, a 9 to 25 pin converter is included to suit PCs with a 25 pin serial
converter.
RS422 Connections
Pin Connection
4 Tx+ A
5 Tx- B
8 Rx+ A
9 Rx- B
1 Common

Isotech Fast-Cal Series Specifications

General

Brand	Isotech
Model	Fast-Cal Series
Category	Measuring Instruments
Language	English