
KEY-SWITCH FUNCTIONS
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P250 DB-15 User I/O connector allows system integrators or end-users to integrate p250 safety features
into their control system. P250’s key-switch, shutter, and remote interlock functions serve to enable or
disable DC power to p250’s RF drive. Without DC power, the RF driver cannot supply RF energy to the
resonator, causing the CO2 gas to remain in a zero-energy state. P250 status indicators provide users
with a quick visual indication of the laser’s operational status. All power to the laser’s RF board is
removed when the RDY indicator is Off (Laser Ready output open).
Key-switch functions
OEM lasers
On OEM lasers, the RDY LED illuminates on DC power-up (when the Remote Interlock input is enabled)
and five seconds later, DC power is applied to the RF driver. When the Shutter Open Request input is
inactive (SHT indicator Off) only tickle pulses are applied to the laser. PWM Command signals are
enabled only when voltage is applied to both Shutter Open Request and Remote Interlock inputs (INT
LED green, RDY LED On, and SHT LED On). Over temperature faults are reset by removing and then re-
applying DC power after the laser has cooled. Remote interlock faults are not latched; the RDY LED
illuminates yellow as soon as the interlock circuit is closed (when the INT LED turns from red to green)
and five seconds later lasing is enabled.
Although a Remote Reset/Start Request input is not required to reset OEM faults, it can be used to
inhibit (disable) lasing. Disable the laser by applying a voltage in the range of ±5–24 VDC to Pin 2, the
Remote Reset/Start Request input. Removing voltage allows power to reach the RF driver and begins a
five-second countdown after which lasing is enabled (RDY LED illuminates yellow). The RF driver is
disabled as long as voltage is applied to Pin 2.
Important Note: When connecting field wiring to the Remote Reset/Start Request input, use
twisted pair and/or shielded cabling. Refer to NOVANTA Technical Bulletin #021 for details. After
the Laser Ready output closes, a five-second delay occurs before lasing is enabled.
Your control system can monitor the laser’s ready status on the User I/O connector by connecting your
system’s input between Pin 8, Laser Ready, and Pin 13, Output Common (see prior figures).
The Laser Ready output closes when the laser is enabled (RDY LED illuminated yellow), indicating that
lasing is possible. The output is open (RDY LED off) when lasing is disabled.
Shutter functions
An internal EM shutter is optional for p250 lasers, but the electronic shutter is available on all lasers.
Lasing is enabled when the shutter is open (SHT LED illuminated blue) and disabled when the shutter is
Closed (SHT LED off).
For p250 OEM lasers in automated systems, shutter actuation is provided by the (EM) Shutter Open
Request signal via Pin 10 on the User I/O connector. To use this feature, apply a voltage in the range of
±5–24 VDC to Pin 10, Shutter Open Request. This input signal causes the SHT LED to illuminate
(provided the RDY indicator is On) and opens the physical shutter to allow lasing. Removing voltage
from the Shutter Open Request input causes the physical shutter to close and block the beam path,
extinguishing the SHT lamp and allowing only tickle signals to reach the tube.
Содержание p250
Страница 1: ...ENGINEERED BY SYNRAD p250 Laser User Manual...
Страница 13: ...CONTENTS DESCRIPTION CONTINUED PAGE 13 Contents Description continued Figure 1 1 p250 ship kit contents...
Страница 15: ...NOMENCLATURE CONTINUED PAGE 15 Nomenclature Continued Figure 1 2 Anatomy of a model number...
Страница 21: ...ADDITIONAL LASER SAFETY INFORMATION PAGE 21 P250 label locations Figure 2 1 P250 hazard label locations...
Страница 27: ...EUROPEAN UNION EU REQUIREMENTS ROHS COMPLIANCE PAGE 27 Figure 2 3 p250 Declaration Document...
Страница 40: ...RF POWER SUPPLY PAGE 40 Table 4 3 Dew point temperatures Continued...
Страница 63: ...INPUT OUTPUT SIGNALS PAGE 63 Table 4 4 User I O pin descriptions Continued...
Страница 83: ...P250 GENERAL SPECIFICATIONS PAGE 83 p250 General Specifications Table 4 5 p250 general specifications...
Страница 84: ...P250 GENERAL SPECIFICATIONS PAGE 84 Table 4 5 p250 general specifications Continued...
Страница 86: ...P250 OUTLINE MOUNTING DRAWINGS PAGE 86 Figure 4 46 p250 outline mounting dimensions mounting feet removed...
Страница 87: ...P250 OUTLINE MOUNTING DRAWINGS PAGE 87 Figure 4 47 p250 packaging instructions...
Страница 93: ...OPERATIONAL FLOWCHART PAGE 93 Operational flowchart Figure 5 1 p250 operational flowchart...
Страница 94: ...STATUS LED S PAGE 94 Status LED s Table 5 2 p250 Input Output LED Status Signals...
Страница 105: ...INDEX PAGE 1 This page is intentionally left blank...