Synrad p250, User Manual, Page: 62 / 106

INPUT/OUTPUT SIGNALS PAGE | 62
Table 4-5 Input circuit specifications.
Important Note: The Remote Reset/Start Request input must not be sent until p250’s +5 VDC
power sup-ply has stabilized (approximately 200 ms after DC power-up).
Output signals
p250’s five user outputs correspond to the status functions described below. These outputs are
optoisolated solid-state relays that allow for high-side or low-side switching. The shared connection,
Output Common, is separate from the laser’s chassis ground to allow high-side or low-side switching and
to isolate control signals for optimum EMI performance.
p250’s optically-isolated outputs are useful for sending laser status to a Programmable Logic Controller
(PLC) or computerized control system. Each of the five outputs can source 50 mA at ±24 VDC
maximum for a total load of 250 mA. For controlling larger loads, use these outputs to drive a control
relay.
Important Note: Interlock Open and Shutter Open output signals are dependent control
functions. The Shutter Open output will not close (SHT LED On) until a Shutter Open Request
signal is applied and the Interlock Open output opens (causing INT LED to illuminate green and RDY LED
to turn On).