Novanta i401, Руководство пользователя

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INPUT/OUTPUT SIGNALS PAGE | 71
Figure 4-6 Auxiliary DC power diagram
Pin 4 + 5 VDC Auxiliary Power
This connection pr5 VDC for driving external inputs or outputs. The +5 VDC Auxiliary
Power output can source up to 0.5 A and is protected by a 0.5 A self-resetting fuse. The return
(ground) path must be through Pin 12, Auxiliary DC Power Ground.
Pin 5 + 24 VDC Auxiliary Power
This connection pr24 VDC for driving external inputs or outputs. The +24 VDC Auxiliary
Power output can source up to 0.5 A and is protected by a 0.5 A self-resetting fuse. The return
(ground) path must be through Pin 12, Auxiliary DC Power Ground.
Pin 12 Auxiliary DC Power Ground
This connection provides a ground (earth) connection for +5 and +24 VDC auxiliary power out-
puts. This pin is the only User I/O pin that is connected to the laser’s chassis ground. Do not use
this pin for grounding if I/O circuits are powered from an external customer-supplied DC power
source.
Input signals
A total of four user inputs allows control of I401 lasers. Remote Interlock, Shutter Open Request, and
Remote Reset/Start Request inputs are optoisolated and bi-directional, allowing for positive or negative
polarity signal inputs. These three signals also share a common return connection, Input Common, which
is separate from chassis ground to completely isolate control signals for optimal EMI performance. The
fourth input, PWM Input, is optoisolated and has a separate return, PWM Return, to fully isolate PWM
signals from the other three user inputs. Note that throughout this manual, input voltage levels are speci-
fied with respect to their corresponding return line.
Pin 1 PWM Return
Connect the return side of your PWM Command signal to this pin. Refer to Table 3-4 for input
circuit specifications.
Pin 2 Remote Reset/Start Request
Apply a positive or negative voltage (±5–24 VDC) with respect to Pin 11, Input Common, to
disable the laser. The laser remains disabled while voltage is applied to this pin. Removing voltage
from the Remote Reset/Start Request pin causes the laser’s RDY lamp to illuminate and begins a
five-second countdown after which lasing is enabled. Because all DC power is removed from the
laser’s RF modules when this input is active, no lasing can occur until voltage is removed from Pin
2. Refer to Table 3-4 for input circuit specifications.
Pin 3 Remote Interlock
Apply a positive or negative voltage (±5–24 VDC) with respect to Pin 11, Input Common, to enable
lasing. If your system does not use a remote interlock, this pin must be connected to a voltage
source in the range of ±5–24 VDC. Refer to Figure 3-7 for a diagram showing how the Remote
Interlock input is factory-jumpered on the Quick Start Plug. Because all DC power is removed
from the laser’s RF modules when this input is inactive, no lasing can occur until voltage is
applied to Pin 3. Refer to Table 3-4 for input circuit specifications.