Delta Tau PMAC2A-PC/104 manual Resistor Packs Configuration

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PMAC2A PC104 Hardware Reference Manual

Resistor Packs Configuration

Differential or Single-Ended Handwheel Encoder Selection

The handwheel encoder differential input signal pairs to the PMAC have user-configurable pull-up/pull- down resistor networks to permit the acceptance of either single-ended or differential signals in one setting, or the detection of lost differential signals in another setting.

The ‘+’ inputs of each differential pair each have a hard-wired 1 kpull-up resistor to +5V. This cannot be changed.

The ‘-‘ inputs of each differential pair each have a hard-wired 2.2 kresistor to +5V; each also has another 2.2 kresistor as part of a socketed resistor pack that can be configured as a pull-up resistor to +5V, or a pull-down resistor to GND.

If this socketed resistor is configured as a pull-down resistor (the default configuration), the combination of pull-up and pull-down resistors on this line acts as a voltage divider, holding the line at +2.5V in the absence of an external signal. This configuration is required for single-ended inputs using the ‘+’ lines alone; it is desirable for unconnected inputs to prevent the pick-up of spurious noise; it is permissible for differential line-driver inputs.

If this socketed resistor is configured as a pull-up resistor (by reversing the SIP pack in the socket), the two parallel 2.2 kresistors act as a single 1.1 kpull-up resistor, holding the line at +5V in the absence of an external signal. This configuration is required if complementary open-collector drivers are used; it is permissible for differential line-driver inputs.

If Pin 1 of the resistor pack, marked by a dot on the pack, matches Pin 1 of the socket, labeled by a white square, then the pack is configured as a bank of pull-down resistors. If the pack is reversed in the socket, it is configured as a bank of pull-up resistors.

RP22 is the 6-pin pull-up/pull-down resistor pack for the handwheel encoder input.

Handwheel Encoder Termination Resistors

The PMAC provides a socket for termination resistors on the handwheel encoder differential input pairs coming into the board. As shipped, there is no resistor pack in the RP23 socket. If these signals are brought long distances into the PMAC board and ringing at signal transitions is a problem, a SIP resistor pack may be mounted on the RP23 socket to reduce or eliminate the ringing. The 6-pin termination resistor pack is the type that has independent resistors (no common connection) with each resistor using two adjacent pins.

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Acc-2P Hardware Setup

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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 IntroductionAcc-1P Option 1 I/O Ports Option 12 Analog-to-Digital ConvertersAcc-1P Axis Expansion Piggyback Board Acc-1P Option 2 Analog-to-Digital ConvertersAcc-2P Option 1B Ethernet Interface Acc-2P Communications BoardAcc-2P Option 1A USB Interface Acc-2P Option 2 Dpram CircuitryPMAC2A PC104 Hardware Reference Manual Introduction Base Board Hardware Setup Clock Configuration JumpersBoard Reset Jumpers Resistor Packs Configuration CPU Jumper ConfigurationConfiguration Jumpers Communication JumpersDevice Resistor Pack Pack Size PMAC2A PC104 Hardware Reference Manual ACC-1P Hardware Setup Reserved Configuration JumpersE0 Reserved for future use Handwheel Encoder Termination Resistors ACC-2P Hardware Setup Jthw Connector DATx SELxJopt Connector E10 MOx MIx Lines Differential or Single-Ended Handwheel Encoder Selection DAC Outputs Power Supply Power SuppliesDigital Power Supply Machine ConnectionsOvertravel Limits and Home Switches Motor Signals ConnectionsPulse and Direction Stepper Drivers DAC Output SignalsAmplifier Enable Signal AENAx/DIRn ExampleAmplifier Fault Signal Fault Acc-1P General-Purpose Digital Inputs and Outputs J7 PortAcc-2P General-Purpose Digital Inputs and Outputs Jopt Port Acc-1P Thumbwheel Multiplexer Port J2 PortAcc-2P Thumbwheel Multiplexer Port Jthw Port Acc-1P or Acc-2P Handwheel Port JHW / PD Port Optional Analog InputsCompare Equal Outputs Serial Port JRS232 Port Acc-2P Ethernet RJ45 Connector J10 PortAcc-2P USB Connector J1 Port PC DB-9Machine Connections Example Using Analog ±10V Amplifier PMAC2A PC104 Hardware Reference Manual PMAC2A PC104 Hardware Reference Manual Machine Connections Communications Software SetupOperational Frequency and Baud Rate Setup Pmac I-VariablesFiltered DAC Outputs Configuration I54 Baud RateI54 Baud Rate for Acc-1P with Jumper E6 on Position Using Flag I/O as General-Purpose I/OGeneral-Purpose Digital Inputs and Outputs Flag Type Channel NumberAcc-2P with Jumper E5 in Position Open PLC1 ClearThumbwheel Port Digital Inputs and Outputs Acc-1P with Jumper E6 in PositionAnalog Inputs Setup Baseboard Analog InputsAcc-1P Analog Inputs Board Dimensions Base Board Hardware Reference SummaryFeature Feature LocationBoard Layout Connectors and Indicators Page ACC-1P Hardware Reference Summary TB1 JMACH1 J2 Thumbwheel Multiplexer Port Jthw Port J7 General-Purpose Digital Inputs and Outputs Jopt PortJ8 Handwheel / Pulse and Direction Port JHW / PD Port Page ACC-2P Hardware Reference Summary TB1 Jthw Jopt J1 USB Communications Port J8 Handwheel/Pulse and Direction Port JHW / PD PortJ10 Ethernet Communications Port Page E3 Normal/Re-Initializing Power-Up/Reset E0 Forced Reset ControlE1 Servo and Phase Clock Direction Control Base Board E-POINT Jumper DescriptionsE10 E12 Power-Up State Jumpers E8 Phase Clock Lines Output EnableE9 Servo Clock Lines Output Enable Description DefaultE16 ADC Inputs Enable E13 Power-Up/Reset Load SourceE14 Watchdog Disable Jumper E15A, B, C Flash Memory Bank SelectPoint and Physical Location Description Default Layout E18 E19 PC/104 Bus AddressE0 Reserved for Future Use E1 E2 Machine Output Supply Voltage ConfigureACC-1P E-POINT Jumper Descriptions E3 E4 JHW, PD Function SelectE5 Servo Gate Address Select E6 I/O Gate Address SelectE7 Machine Input Source/Sink Control E5 I/O Gate Address Select E1 USB/Ethernet Micro-Controller Firmware Reload EnableACC-2P E-POINT Jumper Descriptions E6 Communications Port SelectPoint and Physical Location Description Default E7- E10 Ports Direction ControlJ4 JRS232 Serial Port Connector Base Board Connector PinoutsTB1 Jpwr Power Supply 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 ACC-2P Connector Pinouts Pin # Symbol FunctionJ1 USB Universal Serial Bus Port Optional Pin Connector J7 Jopt I/O Port Connector J10 Ethernet Port Optional Pin # Function