Teknic EF-785, Руководство по установке

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J5
1 2 3
4 5 6
7 8 9
1
2
9
8
7
6
5
4
3
Main AC Hazard Power - line
Main AC Hazard Power - neutral
Protective earth
24VDC return (Ckts 2 and 3)
+24VDC (Ckts 2 and 3)
AC Control Power - line
24VDC return (Ckt 1)
+24VDC (Ckt 1)
AC Control Power - neutral
Pin # Signal
24VDC
Supplies
J5 24VDC power supply connector
AC C
ONTROL
P
OWER
We refer to the first “type” of AC power as AC Control Power. This simply
means that AC line voltage is always available at the 24VDC supply
connector when machine power is on, regardless of the state of the E-
stop or interlock switches. AC Control Power is typically used to supply a
24VDC supply that will be powering sensors and non-hazardous
actuators throughout the machine. This type of power will remain on
even after a safety event (E-Stop) in the machine has occurred.
M
AIN
AC (H
AZARD
) P
OWER
We refer to the second “type” of AC power available to an external 24VDC
supply as Main AC Power. This means that power to the 24VDC supplies
is on only when hazardous power in the Main area of the machine is on.
Main AC Power is removed after a safety event (E-Stop) has occurred.
Although 24V is not considered hazardous (when fused at or below 10A),
it is often desirable to have some or all of it turn off when a safety event
occurs e.g. in order to turn off solenoid valves such that pneumatics will
exhaust to release pressure in mechanisms, for removing power to low
power stepper motor drives
2
, etc.
There are four 24VDC wiring configurations available depending on
your project requirements. Please refer to the following schematic
fragments for details.
2 Note that although the eF-785 can remove AC power to externally connected 24VDC
supplies, it does not provide any means for quick-discharge of the connected supplies
once AC power is removed. This is usually not an issue if a switching supply is used for
the 24V, which is common, the 24VDC will usually drop very quickly, in less than a few
hundred milliseconds.
e F - 7 8 5 I
N S T A L L A T I O N
M
A N U A L
25
T
EKNIC
, I
NC
F
AX
(585)784-7460 V
OICE
(585)784-7454