Dig1 Buffered Output - SKF Multilog IMx-S Series User Manual

System Relay Output
The relay driver output labelled SYSTEM OUT can be connected and used as an external
system alarm indicator.
This is a system fault relay drive that is hardware controlled and cannot be configured by
software.
The system relay driver output is always activated whilst the system is Ok, a "Fail-safe"
configuration.
Important - Total coil current for all five connected relays (Dig1 Out to Dig4 Out
and SYSTEM OUT) should not exceed 300 mA.

Dig1 Buffered Output

Each IMx-S 16 has one and the IMx-S 32 has two digital buffered outputs labelled as Dig1
In Buf Output (a buffered copy of the Dig1 input) as shown in Relay terminal list table,
above.
•
Dig1 In Buf Output copies and buffers the signal from digital channel 1 labelled as
Dig1.
•
This output is a low-side switch to GND. (The output does not provide any signal
power, just short to GND.)
•
This output can be directly connected to a two-wire tachometer input in the other
IMx I/O board.
–
2-wire input B.
•
Dig1 In Buf Output and GND are located in last two pins in the relay terminal block.
SKF Multilog On-Line System IMx-S
User Manual – Revision S
Figure 3 - 7.
Relay Open Collector Driver Showing Alarm Inactive.
Connect Dig1 In Buf Output to Tacho 2-wire input A and connect GND to Tacho
➢ On I/O board v1.24 and greater, those with a hole in front panel
for DIP21, the phase of the buffered output has been inverted.
This inverted buffered out will then have the same phase as the
input signal.
Unit Configuration
Dig1 Buffered Output
3 - 7