Modicon B557

Gould Modicon B557 5VDC input module

The MODICON B557 VDC TTL Input Module (Figures VI-15 and VI-16) conditions up to four independent +5 VDC input signals to the signals used internally by the controller.
Electrical Characteristics:
Input signal requirements for each of the FOUR inputs:
(See Tech documentation for other states and more information)
Logic One State:
Conditions:
Input "High" or open circuit. Input indicator ON. Controller input ON. Level:
VIH = 2.OV minimum.
II = 0.1 mA max. at VIH 5.5V:
V source = 5.OV.
Maximum input voltage + 8.0 volts.
Maximum positive clamp current: 25 mA.


Terminal 1: DC IN (+)
Terminal 2: DC Return
Terminal 3: Input 1
Terminal 4: Input 2
Terminal 5: Not used
Terminal 6: Not used
Terminal 7: Input 3
Terminal 8: Input 4

See also: Schneider B557, Gould B557, AEG B557