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ISP - Rev 6/95
5.2 Mother Board terminals
The MBA-ISP/N is designed for 19" rack systems. It has screw type terminals for
both power and signals with identical designations as in the panel versions
except for the following new terminals:
21 Potential free Inhibit Input (+). See 7.1.1.
22 Potential free Inhibit Input (-). See 7.1.1.
The Potential Free Inhibit Input is applicable only when the "inverted inhibit
logic" is used (R18 in the amplifier is inserted). An opto-Coupler (IL5) is used
to isolate between the Inhibit signal and the amplifier circuit. Activating this
opto-coupler is done by inserting R1 on the mother board according to the
following relation:
R1 = 100 x Vinh (ohm)
Vinh - voltage in the inhibit input.
Standard value is 2.4K (For 24 volts) Source must be capable of source or sink
10mA.