DS2/DS4 Hardware Manual
Page 35
5.7
AIM104 – PULSE
The AIM104-PULSE board provides 16 opto-isolated digital inputs. Of these, the first 4 inputs may be used
as frequency (0-100 kHz) pulse inputs. The first 10 inputs may be used as low frequency accumulator pulse
inputs. Jumper options are included for each digital input to select a 10ms input debounce filter.
5.7.1
Board Specification
Power Consumption
0.75 Watts, excluding loop power
Operating Temperature
-20 to +70 C
Number of Inputs
16 opto-isolated digital inputs
All may be used as status, or:
Inputs 1-4 may be frequency inputs
Inputs 1-10 may be accumulator inputs
Switching Voltage Range
10 V to 36 V
Maximum Input Frequency
50 Hz with debounce filter enabled
100 KHz with debounce filter disabled
Isolation
1000 V to field
100 V between adjacent channels
Protection
Reverse protection diodes
5.7.2
AIM104-PULSE Link Settings
Link settings on the AIM104-PULSE determine where the board's I/O will appear in memory. If more than
one AIM104-PULSE board is used, the first AIM104-PULSE in a Director should be addressed at Board #1,
and the second as Board #2.
Board Fitted
PC/104 Base Address
LK1 Jumpers Installed
Board #1
3D0 H
E, G, H
Board #2
3D4 H
E, G
Input Filter Selection
Each opto-isolated input channel can be set to include an input filter to reduce input errors caused by switch
contact bounce by setting LK 6 where
•
Inputs 1 - 16 are LK6 A – P
Common Positive Input Selection
The positive side of each channel can connected to the positive side of the common isolated supply by
inserting the following links. This reduces the number of wire connections, since only one side (-ve) requires
an external connection. To switch ON the input, the –ve input terminal should be switched to the isolated 0V:
•
Inputs 1 - 16 are Links LK4A-P, respectively
