Mitsubishi Electric MELSEC Q Series User Manual page 62

5
SETTINGS AND PROCEDURES BEFORE
OPERATION
1) Precautions for selecting power supply
Power supply input of a light curtain will be connected to the COM terminal of
the extension module. Select a light curtain compatible with the specifications
for the COM terminal and X0/X1 terminals of the extension module.
Table 5.6 Specifications for selectable light curtains
Rated voltage
Total amount of current consumption of light
*1
curtain (receiver)
ON voltage
OFF voltage/current
* 1: Current consumption = COM terminal output current (500[mA]) - ((X0 terminal input current
(40[mA]) + X1 terminal input current (40[mA]))
The number of light curtains means the number of light curtains connected in one system.
One system means the system configured with one main module and one or more extension
module(s).
Specifications for the COM terminal of the extension module
Rated voltage : 23 10% [V]
Output current : Maximum 500[mA]
Specifications for the X0 and X1 terminals of the extension module
ON voltage : 20.0[V] or more
OFF voltage/current : 2.4[V] or less/2.0[mA] or less
Input current : Maximum 40[mA]
Input voltage : Maximum 26.4[V]
2) Precautions for selecting power supply
Power of a light curtain is supplied from power supply connected between
+24V(SAFETY) and 24G(SAFETY) of the main module via the COM terminal
of the extension module. If the current or voltage supplied from the COM
terminal is insufficient, operation of the light curtain cannot be guaranteed.
Select the power supply device which meets the following conditions.
Power supply output voltage : 24 10% [V]
Power supply output current : Main module current consumption (85[mA]) +
5.4.1 Precautions for safety devices and wiring
23 10 [V]
One light curtain is connected: 420[mA] or less
Two light curtains are connected: 340[mA] or less
20.0[V] or more
2.4[V] or less/2.0[mA] or less
Number of light curtains
(Extension module current consumption
(80[mA]) Number of extension modules) +
(Total amount of current consumption of light
*2
curtain ) + ((X0 terminal input current (40[mA])
+ X1 terminal input current (40[mA])) Number
of light curtains)[mA] or more
* 2: Control output current is not included. If included,
subtract the control output current amount.
5.4 Wiring
1
2
3
4
5
6
5
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