Delta Tau Geo MACRO, User Manual And Reference Manual

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Geo MACRO Drive User Manual
102 Setting Up Discrete Inputs and Outputs
Limit and Flag Circuit Wiring
The Geo PMAC allows the use of sinking or sourcing position limits and flags to the controller. The
opto-isolator IC used is a PS2705-4NEC-ND quad phototransistor output type. This IC allows the current
to flow from return to flag (sinking) or from flag to return (sourcing).
A sample of the positive limit circuit is shown below. The 4.7K resistor packs used will allow 12-24V flag
inputs. If 0-5V flags are used, then a 1K
Ω
resistor pack (RP) can be placed in either RP7 (channel 1) or RP8
(channel 2). If these resistor packs are not added, all flags (
±
Limits, Home, User) will be referenced from
12-24V.
Connecting Limits/Flags to the Geo Drive
The following diagrams illustrate the sinking and sourcing connections to a Geo Drive. This example
uses 12-24V flags.
Flag Supply
12-24VDC
24V
0V
Return
Flag
Sinking
Separate
Supply
Flag Supply
12-24VDC
24V
Return
Flag
Sourcing
Separate
Supply
0V