Rockwell Automation MAI32AD 32-Analogue Input Module Differential Input - Manual (Page 14)

14 MAI32*AD October 2005 – Issue 4
Triguard SC300E
CAUTION 5
When inserting a module ensure that it is aligned with the markings on the chassis rails and
that it engages with the upper and lower guides. Improper insertion may cause damage to the
module and/or chassis connectors.
Single-slot hot repair
Operate the On/Off Line Request switch on the faulty module, the three On Line LEDs should
all go out to indicate that the MPPs have recognised the request and taken the module off-line.
The last read data input from the module will be maintained until the new module is on-line.
Slacken the two module securing screws and use the black ejection levers (top and bottom) to
draw the module from its slot.
Insert the new module ensuring that it engages properly in the upper and lower guides in the
chassis, the top and bottom chassis rails carry alignment marks to assist. Pull out the
ejection levers and as the module is pushed back engage the levers on the chassis rails. The
levers should then be used to draw the module into position, some resistance will be felt as the
rear connector pins engage. The module should be fixed in position with the securing screws.
Operate the On/Off Line Request switch and check that the three On Line LEDs illuminate for
one second, extinguish for one second and then illuminate permanently to indicate that the
module has been put on-line. If the LEDs do not illuminate either the first or second time or fail
to remain illuminated, then the module must be considered faulty.
Dual-slot hot repair
Insert the new module into the vacant hot repair slot ensuring that it engages properly in the
upper and lower guides in the chassis, the top and bottom chassis rails carry alignment marks
to assist. Pull out the ejection levers and as the module is pushed back engage the levers on
the chassis rails. The levers should then be used to draw the module into position, some
resistance will be felt as the rear connector pins engage. The module should be fixed in
position with the securing screws.
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 LEDs 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 LEDs 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 LEDs should remain illuminated
indicating that it is still on-line.
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.