dsqc 354 documentation

gsusnvs

hi there, does anyone have documentation about the dsqc 354 card?, i'm working on a s4c+ controller using conveyor tracking and i was asked to change the encoder conected to this card, but the client doesnt have any documentation about anything...
i appreciate if someone have this info.
thanks

noholm

The encoder must be of 2 phase type for quadrature pulses, to enable registration of reverse conveyor motion, and to avoid false counts due to vibration etc. when the conveyor is not moving.
Output signal: Open collector PNP output
Voltage: 10 - 30 V (normally supplied by 24 VDC from DSQC 354)
Current 50 - 100 mA
Phase: 2 phase with 90 degree phase shift
Duty cycle: 50%
An example encoder is the Lenord & Bauer GEL 262.

The number of pulses per revolution for the encoder must be selected in relation to the gearing between the conveyor and the encoder. The pulse ratio from the encoder should be in the range of 1250 - 2000 pulses per meter of conveyor motion. The pulses from channels A and B are used in quadrature to multiply the pulse ratio by 4 to get counts. This means that the control software will measure 5000 - 10000 counts per meter for an encoder with the pulse ratio given above. Reducing the number of measured counts below 5000 will reduce the accuracy of the robot tracking. Increasing the number of measured counts beyond 10000 will have no significant effect as inaccuracies in robot and cell calibration will be the dominating factors for accuracy.