Elmo ISP manual Mother Board terminals

20

5.2Mother 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:

21Potential free Inhibit Input (+). See 7.1.1.

22Potential 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.

ISP - Rev 6/95