Probe connector pin-outs
The electrical connections to and from the SP80 and SP80H are through the 15-way HDD connector at the top of the probe body.
SP80 and SP80H probe connector pin-outs
Vref (see note below)
GREEN LED OFF
RED LED ON
+9 V to +18 V
Reserved for Renishaw use
NOTE: Vref is nominally 2.5 V and is the zero crossing reference for the Sin and Cos output signals. This reference voltage, and all other signal inputs must be monitored downstream of the probe using a high impedance buffered input.
The effective impedance of any input signal to ground should be >100 KΩ. Failure to comply with this requirement may result in an apparent fault, or reduction in amplitude of the Sin and Cos outputs. Contact Renishaw for advice if uncertain.
The recommended cable specification for the SP80 probe is the same as the current motorised head cable (PH10) which is:
- Mating connectors must be metal bodied
- The overall cable screen is continuous and connected to the system ground on the user's equipment through the bodies of the connectors
- The maximum overall single core resistance between the SP80 and the IU80 interpolator must be <2.5 Ω.
The maximum cable length between the SP80 / SP80H and the interface equipment is 30 m.