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Tachometer Output:
When used with the Bodine ABL-3910/3911 Brushless
DC Motor Controls, the Model 3984 module provides digital tachometer
output at the ITAK terminal for monitoring motor speed. The output pulse
levels correspond to one motor revolution. The ITAK output provides an
unterminated open collector output. A pull-up resistor or another logic device
is required for assistance in interfacing the ITAK output.
Internal Auxiliary Power Supply:
The Model 3984 Isolated Interface Module
has an internal ±12 VDC, 10 mA power supply which may be used for external
components if needed. It is accessible via the ISO+, ISO-, and ICOM terminals
on terminal block TB2.
AC Power Connections
AC Power should always be the last connection made during installation
and the first item disconnected before servicing. The Model 3984 may be
connected to either a 115 VAC, 50/60 Hz or a 230 VAC, 50/60 Hz source.
For 120 VAC:
Connect a jumper from terminals 1 to 2 and from 3 to 4. Refer to Figure 7. Then
connect 120 VAC source to terminals 1 and 4 of terminal block TB1.
For 240 VAC:
Connect a jumper from terminal 2 to 3, then connect 240 VAC source to
terminals 1 and 4. Refer to Figure 7.
Figure 6 – ITAK Output
pull-up resistor
User supplied
User Equipment
User Input
I less than or
equal to 2mA
equal to 55V
V less than or
(+)
User Logic Supply
ICOM
ITAK
Model 3984
collector output
Unterminated open
Model 3984
Logic
