Delta Tau PMAC2A-PC/104 manual Overtravel Limits and Home Switches, Motor Signals Connections

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PMAC2A PC104 Hardware Reference Manual

Flags Power Supply

Each channel of PMAC has five dedicated digital inputs on the machine connector: PLIMn, MLIMn (overtravel limits), HOMEn (home flag), FAULTn (amplifier fault), and USERn. A power supply from 5 to 24V must be used to power the circuits related to these inputs. This power supply can be the same used to power PMAC and can be connected from the TB1 terminal block or the JMACH1 connector.

Overtravel Limits and Home Switches

When assigned for the dedicated uses, these signals provide important safety and accuracy functions. PLIMn and MLIMn are direction-sensitive over-travel limits that must conduct current to permit motion in that direction. If no over-travel switches will be connected to a particular motor, this feature must be disabled in the software setup through the PMAC Ix25 variable.

Types of Overtravel Limits

PMAC expects a closed-to-ground connection for the limits to not be considered on fault. This arrangement provides a failsafe condition. Usually, a passive normally close switch is used. If a proximity switch is needed instead, use a 5 to 24V normally closed to ground NPN sinking type sensor.

Home Switches

While normally closed-to-ground switches are required for the overtravel limits inputs, the home switches could be either normally close or normally open types. The polarity is determined by the home sequence setup, through the I-variables I9n2. However, for the following reasons, the same type of switches used for over-travel limits are recommended:

•Normally closed switches are proven to have greater electrical noise rejection than normally open types.

•Using the same type of switches for every input flag simplifies maintenance stock and replacements.

Motor Signals Connections

Incremental Encoder Connection

Each JMACH1 connector provides two +5V outputs and two logic grounds for powering encoders and other devices. The +5V outputs are on pins 1 and 2; the grounds are on pins 3 and 4. The encoder signal pins are grouped by number: all those numbered 1 (CHA1+, CHA1-, CHB1+, CHC1+, etc.) belong to encoder #1. The encoder number does not have to match the motor number, but usually does. Connect the A and B (quadrature) encoder channels to the appropriate terminal block pins. For encoder 1, the CHA1+ is pin 5 and CHB1+ is pin 9. If there is a single-ended signal, leave the complementary signal pins floating – do not ground them. However, if single-ended encoders are used, check the settings of the resistor packs (see the Hardware Setup section for details). For a differential encoder, connect the complementary signal lines – CHA1- is pin 7, and CHB1- is pin 11. The third channel (index pulse) is optional; for encoder 1, CHC1+ is pin 13, and CHC1- is pin 15.

Example: differential quadrature encoder connected to channel #1:

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Machine Connections

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Contents PMAC2A-PC/104 Copyright Information Delta Tau Data Systems, Inc. Technical SupportTable of Contents Software Setup Base Board Connector Pinouts PMAC2A PC104 Hardware Reference Manual Table of Contents Board Configuration IntroductionOption 12 Analog-to-Digital Converters Acc-1P Axis Expansion Piggyback BoardAcc-1P Option 1 I/O Ports Acc-1P Option 2 Analog-to-Digital ConvertersAcc-2P Communications Board Acc-2P Option 1A USB InterfaceAcc-2P Option 1B Ethernet Interface Acc-2P Option 2 Dpram CircuitryPMAC2A PC104 Hardware Reference Manual Introduction Board Reset Jumpers Base Board Hardware SetupClock Configuration Jumpers CPU Jumper Configuration Configuration JumpersResistor Packs Configuration Communication JumpersDevice Resistor Pack Pack Size PMAC2A PC104 Hardware Reference Manual E0 Reserved for future use ACC-1P Hardware SetupReserved Configuration Jumpers Handwheel Encoder Termination Resistors Jopt Connector E10 MOx MIx Lines ACC-2P Hardware SetupJthw Connector DATx SELx Differential or Single-Ended Handwheel Encoder Selection Power Supplies Digital Power SupplyDAC Outputs Power Supply Machine ConnectionsOvertravel Limits and Home Switches Motor Signals ConnectionsDAC Output Signals Amplifier Enable Signal AENAx/DIRnPulse and Direction Stepper Drivers ExampleAmplifier Fault Signal Fault Acc-1P General-Purpose Digital Inputs and Outputs J7 PortAcc-2P Thumbwheel Multiplexer Port Jthw Port Acc-2P General-Purpose Digital Inputs and Outputs Jopt PortAcc-1P Thumbwheel Multiplexer Port J2 Port Compare Equal Outputs Acc-1P or Acc-2P Handwheel Port JHW / PD PortOptional Analog Inputs Acc-2P Ethernet RJ45 Connector J10 Port Acc-2P USB Connector J1 PortSerial Port JRS232 Port PC DB-9Machine Connections Example Using Analog ±10V Amplifier PMAC2A PC104 Hardware Reference Manual PMAC2A PC104 Hardware Reference Manual Machine Connections Software Setup Operational Frequency and Baud Rate SetupCommunications Pmac I-VariablesI54 Baud Rate for Filtered DAC Outputs ConfigurationI54 Baud Rate Using Flag I/O as General-Purpose I/O General-Purpose Digital Inputs and OutputsAcc-1P with Jumper E6 on Position Flag Type Channel NumberAcc-2P with Jumper E5 in Position Open PLC1 ClearThumbwheel Port Digital Inputs and Outputs Acc-1P with Jumper E6 in PositionAcc-1P Analog Inputs Analog Inputs SetupBaseboard Analog Inputs Board Dimensions Base Board Hardware Reference SummaryBoard Layout FeatureFeature Location Connectors and Indicators Page ACC-1P Hardware Reference Summary TB1 JMACH1 J8 Handwheel / Pulse and Direction Port JHW / PD Port J2 Thumbwheel Multiplexer Port Jthw PortJ7 General-Purpose Digital Inputs and Outputs Jopt Port Page ACC-2P Hardware Reference Summary TB1 Jthw Jopt J10 Ethernet Communications Port J1 USB Communications PortJ8 Handwheel/Pulse and Direction Port JHW / PD Port Page E0 Forced Reset Control E1 Servo and Phase Clock Direction ControlE3 Normal/Re-Initializing Power-Up/Reset Base Board E-POINT Jumper DescriptionsE8 Phase Clock Lines Output Enable E9 Servo Clock Lines Output EnableE10 E12 Power-Up State Jumpers Description DefaultE13 Power-Up/Reset Load Source E14 Watchdog Disable JumperE16 ADC Inputs Enable E15A, B, C Flash Memory Bank SelectPoint and Physical Location Description Default Layout E18 E19 PC/104 Bus AddressE1 E2 Machine Output Supply Voltage Configure ACC-1P E-POINT Jumper DescriptionsE0 Reserved for Future Use E3 E4 JHW, PD Function SelectE7 Machine Input Source/Sink Control E5 Servo Gate Address SelectE6 I/O Gate Address Select E1 USB/Ethernet Micro-Controller Firmware Reload Enable ACC-2P E-POINT Jumper DescriptionsE5 I/O Gate Address Select E6 Communications Port SelectPoint and Physical Location Description Default E7- E10 Ports Direction ControlBase Board Connector Pinouts TB1 Jpwr Power SupplyJ4 JRS232 Serial Port Connector Pin# Symbol Function DescriptionJ3 JMACH1 Machine Port Connector J3 JMACH1 50-Pin Header J4 JMACH2 Machine Port Baseboard Connector ACC-1P Connector Pinouts J2 Jthw Multiplexer Port Connector Pin# SymbolJ3 JMACH1 Machine Port Connector Pin Header J3 JMACH1 50-Pin-Header Connector 34-Pin Header FLG78VJ7 Jopto I/O Port Connector J8 JHW Handwheel Encoder Connector Page J1 USB Universal Serial Bus Port Optional ACC-2P Connector PinoutsPin # Symbol Function Pin Connector J7 Jopt I/O Port Connector J10 Ethernet Port Optional Pin # Function
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