User`s manual

Selecting the power supply module Power supply modules
MELSEC System Q, Hardware 7 – 3
7.2.3 Life detection power supply module Q61P-D
The power supply Q61P-D is equipped with life detection. This function estimates the remanent
life time of the power supply and indicates it by a LED and by an isolated contact. Together with
the POWER LED, failure diagnostics are also possible.
* The remaining life of the module varies depending on the ambient temperature.
(If the ambient temperature rises by 10 쎶C, the remaining life of the module will be shortened by half.)
Connect the terminal LIFE OUT to an external lamp or to an PLC input for monitoring by the
sequence program to recognise a shorted lifetime.
LED located on the
front of the module
LIFE OUT terminal Module status
POWER LIFE
OFF OFF OFF
 AC power is not input
 Power failure (including momentary power fail-
ure for 20 ms or more)
 Power supply module failure
ON (green)
ON (green)
ON
Normal operation
ON (orange) Normal operation (Remaining life approx. 50 %)*
Flicker
(orange)
ON: 5 s
OFF: 1 s
OFF
Normal operation (Remaining life approx. 1 year)*
Replacement of the module is recommended
ON: 0.5 s
OFF: 0.5 s
Normal operation
(Remaining life approx. 6 months)*
OFF Life expired
ON (red)
Turns off and on three
times at intervals of 1
second and then off
Ambient temperature is out of range (Ambient
temperature is exceeding the specification)
Flicker
(red)
ON: 1 s
OFF: 1 s
Function failure (Normal processing is not availa-
ble due to a failure of the life diagnostics circuit in
the module)
OFF
Ambient temperature is out of range (Ambient
temperature is exceeding the specification and
also the life detection function has stopped.)
ON (orange) OFF Watchdog timer error in the module
Tab. 7-5: Indication of remaining life (power supply module Q61P-D)