CABLE RESTRICTIONS Cable restrictions for the plotter are determined by the type of interface being used. Recom- mendations for each interface are supplied in the following paragraphs. RS-232-C INTERFACE The use of short cables (each less than 15 metres or 50 feet) is recommended for the RS-232-C Interface. Longer cables are permissible, provided the load capacitance does not exceed 2500 picofarads. CENTRONICS INTERFACE The use of short cables (each less than 2 metres or 6.6 feet) is recommended for the Centron- ics Interface. HP-IB INTERFACE The HP-IB (Hewlett-Packard Interface Bus) allows up to 15 devices to be connected.
The maximum cable length is restricted to 2 metres (6.6 ft.) per device up to a total of 20 metres (65.8 ft.). The devices may be connected in a star or linear bus network. 2-4 Site Planning and Requirements