| Brand/Manufacturer | ABB/SWEDEN |
| Part Number | SPDSM04 |
| Alternate Part Number | SPDSM04 |
| Description | Pulse Input Module |
| Dimennsions | 4.5*15.5*12.3cm |
| Weight | 4lbs |
PRODUCT DETAILS
The technical specifications of the inputs are the same with the
other
digital inputs, but with the following exception:
1. Caused by the direct electrical connection with the output, the
varistor
for demagnetization of inductive loads (see figure above) is also
in effect
at the input.
2. Therefore, the voltage difference between UP5 and the input
signal
must not be greater than the limit voltage of the varistor.
3. The limit voltage of the varistor is ca. 36 V. This means,that
if UP5 = 24V,
the input signal voltage must be between -12 V and +30 V. If UP5 =
30 V,
the input voltage has to be within -6 V and +30 V.
If all of the 8 channels of the group are used as inputs, and if in
addition the
UP5 terminal is left unconnected, no restrictions exist for the
inputs. The
input signal voltages then may be within -30 V and +30 V. There is
no
restriction for the input/output group concerning its safety
against reversed
polarity.
