technical reference
52
SYNRAD OEM v30 Operator’s Manual Version 2
Interface connections
Table 4-7
RJ45 input circuit specifications
Input Signals
Input Device Type and Specifications
PWM Positive
High-speed optoisolator LED, forward voltage drop (Vf) 1.5 VDC
Off state Vmax +0.8 VDC
On state Vmin +3.5 VDC @ 5 mA
On state (continuous) Vmax +6.7 VDC @ 10 mA
Frequency, max. 100 kHz
Laser Enable
5V logic input buffer
Off state Vmax +0.8 VDC
On state Vmin +2.0 VDC @ 0.2 mA
On state (continuous) Vmax +5.0 VDC @ 0.5 mA
Note: Do not apply a Laser Enable signal until the OEM v30’s in5 VDC power supply has
stabilized (approximately 200 ms after DC power-up).
Sample input circuits
Figure below shows a method for applying a Laser Enable signal to the RJ45 Interface B con-
nector. In this case, the customer must also supply the +5V voltage necessary to drive the
circuit.
Caution
possible
equipment
damage
The Interface B (RJ45) Laser Enable input is a direct 5V logic input.
Do not send a voltage signal to the Laser Enable input (Pin 7) until
DC power is applied; otherwise, the control board will be damaged.
Observe all 5V logic specifications and precautions when integrating
OEM v30 inputs and outputs into your control system.
PWM Negative (Pin 6) must be connected to GND (Pin 8) or it must
serve as the return path for the PWM Positive signal.
Figure 4-13
Customer powered Laser Enable circuit
Laser enabled when
switch or contact closed
RJ45 (
INTERFACE B
) CONNECTOR PINS
(7)
LASER ENABLE
(8)
GND
100 Ohm
+5 VDC
5 VDC RETURN
