Rockwell Automation MDO32BNS 32-Channel Digital Output Module - Manual (Page 17)

MDO32BNS October 2005 – Issue 7 17
Triguard SC300E MDO32BNS 32-Channel Digital Output Module
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 black 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.
NOTE
If the replacement board comes on-line but the health LED is extinguished a fault still exists. If
the failure is LFD this may indicate a field fault (open circuit) and the field loops should be
investigated.