Precor p20 - Manual (Page 86)

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Assembling and Maintaining AMT 800-Series Adaptive Motion Trainers
Table 2. P30 internal cable connections
Cable Connector Type Circuit Connector
Location
Safety key
(treadmills only)
Six-contact strip, keyed
Auto Stop sensor
(treadmills only)
Four-contact strip, keyed
Data from base unit Eight-contact modular,
on flat gray cable
Heart rate sensors Four-contact strip, keyed
C-Safe port