Rockwell Automation MHB44IND Pulse Input and Analogue Output Module - Manual (Page 19)

MHB44IND October 2005 – Issue 2 19
Triguard SC300E MHB44IND Pulse Input and Analogue Output Module
2. Operate the On/Off Line Request switch on the new module. Ascertain that the three
On Line LEDs on the new module illuminate for one second, extinguish for one second
and then illuminate permanently as the indicators on the old module extinguish. This
sequence indicates that the new module has been put on-line and the old module
taken off-line. If the indicators on the new module do not illuminate either the first or
second time or fail to remain illuminated, the new module must be regarded as faulty.
The old module indicators should remain illuminated indicating that it is still on-line.
3. If the new module is serviceable, slacken the screws on the old module and use its
ejection levers to remove it from the chassis.
PREVENTIVE MAINTENANCE
No preventive maintenance is necessary.