CALCULATING LOAD CURRENT
The voltage available to drive each load device is a function of
the current draw of the device. This is due to a voltage drop
across a 22
Ω
current limiting resistor in the circuitry of each
output. Examples:
•
For an output used to activate an LED with a 1000
Ω
resistor
in series, the available voltage is 11V.
•
If an output used to activate an strobe light which draws
100mA, the available voltage is 9.1V.
Use the chart at right to calculate the available voltage for the
devices to be driven.
Notes:
Values displayed are based on a nominal supply voltage of
12VDC. Ensure that the device to be activated is rated for the
calculated available voltage. If an auxiliary power supply is
required, the negative terminal of the power supply must be
connected to the terminal 2 of the GEMC-OUT8.
GEMC-OUT8 Wiring Diagram
To terminate more than two conductors
or
conductors of different wire sizes to a terminal,
use the "pigtail" type wiring method as shown at
right. Use insulated wire for the pigtail, and firmly
secure the conductors to the pigtail using an ap-
propriate wire nut or crimp connector for the num-
ber and gauge of conductors used.
I M P O R TAN T W I R I N G M E T H O D S
Incorrect
Correct -- Use pigtail and wire nut / crimp connector
PIGTAIL
WIRE NUT OR
CRIMP
CONNECTOR
PIGTAIL
For single-conductor terminal
blocks
(like the type shown at
left), to terminate more than one
conductor to a terminal, use the
wiring methods shown at right:
WIRE NUT OR
CRIMP
CONNECTOR
PIGTAIL
Correct -- Single incoming and/or pigtail with wire nut / crimp connectors
In
For "barrier" type terminal
blocks
(like the type shown at
left), to terminate two conductors
to a terminal, use the wiring meth-
ods shown at right:
Correct -- Separate incoming and outgoing conductors
In Out
Incorrect
Incorrect
In
Out
