QLM500 INSTALLATION MANUAL
7
PWR-IN
PWR-IN is a 5-pin Male A-Coded M12 connector. Input power must only be supplied to the
QLM500 at the PWR-IN connector; from there it is internally distributed to the connected
reading device, the ID-NET™ network and all the I/O devices.
You can use the CBL-1487 connector and follow the pinout above to build your own Power
Supply connector cable.
You can also use one of the CS-A2-02-G-xx cables which terminate in four single stranded
wires. The brown wire corresponds to pin 1 Vdc, the blue wire to pin 3 GND. The white
and black wires are not used.
The LED placed below the PWR-IN connector, signals the presence of input Power. If the
polarity is correct, the LED is blue; if the polarity is reversed, the LED is red; if no power is
supplied, the LED is off.
CAUTION
The QLM500 and the connected reader are protected from polarity inversion
through the PWR-IN connector, but this is not true for the other devices
connected to the ID-NET™ Network, TRG and I/O connectors (i.e. external
trigger, encoder, etc.). Check the correct Power Supply polarity looking at
the PWR-IN LED before connecting other devices to the QLM500.
The power supply must be between 10 and 30 Vdc only.
Voltage Drop and Max Distributed Current Calculations
For correct ID-NET™ network management, the maximum number of readers which can
propagate power through the QLs must be calculated so that max distributed current is not
exceeded (4.0 A), and so voltage drop doesn't affect reader functioning. This is done
according to the following formula:
Voltage Drop = (Max Reader Current x Number of readers) x
(Resistance per Meter per wire* x Cable length in Meters)
* the resistance calculation must include both wires (Vdc and GND).
Example:
An ID-NET™ network is composed of 4 DS2100N readers. Three 2-meter ID-NET™ cables
are used to connect the readers, which have Cable Resistance = 0.058 Ohms per meter per
wire. The network power is 24 Vdc.
(0.125 A x 4 readers) x [(0.058 x 2) x 6 meters] = 0.348 Vdc voltage drop
24 Vdc - 0.348 = 23.65 Vdc at reader number 4 (worst case)
Integrate a sufficient number of QL200s to resupply network power.
ID-NET
ID-NET is a 5-pin Female A-Coded M12 connector. It is used to connect the network signals
and the power supply for the ID-NET™ Network towards ID-NET™ Slaves.
