The JNIOR Digital Inputs are voltage sensing. Any voltage applied in excess
of 2.5V will activate the input. The red LED will illuminate. These are not
high impedance inputs and have an equivalent resistance of about 1,200 Ohms.
The connected signal source must be capable of supplying at least 25ma of
current in order to trigger an input.
Maximum Voltage Rating: 30V
Inputs are filtered and will detect and count transitions to a frequency of
about 1,800 Hz. These inputs are also debounced by default. This is
configurable by Registry setting.
Higher voltages may be sensed by inserting an additional series resistance.
Inputs are grouped 4 to a connector. These are 8-pin terminal block headers
on 0.200" (5.08 mm) pitch (Weidmuller 1510910000 for instance). The proper
8-pin screw terminal plugs are supplied with the connector kit.
Each input uses a pair of adjacent pins. The (+) positive input of each pair
is that closest to the top (PWR end) of the JNIOR. This is true even with
Digital Inputs located on the opposite side of the product as in the
HELP Topics: MODELS