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Stack-DAQ - Expandable RS232 I/O
Description
A low-cost range of data acquisition and control modules which can be plugged end-to-end on a single RS232 cable. Up to 32 modules can be used on the same serial port simultaneously! The wide range includes analogue and digital I/O, thermocouple input, counter/timer and stepper motor. Comes with their own powerful mini-SCADA software package, ModCom. Now with NEW Analogue Input , Digital Input, Digital Output and Bipolar Microstep driver units.
Product
The Stack-DAQ range is a truly novel innovative range of data acquisition and control units suitable for use with any RS232 equipped PC. You need only use those modules required for your task: whether it's digital I/O, analogue input or output, thermocouple input, relay boards, stepper motor drivers, frequency measurement, RPM measurement, pulse counters & timers, or a combination of all, we offer a full line of RS232 modules which can be plugged end-to-end on a single RS232 cable. Up to 32 different modules (or features) can be used on the same serial port simultaneously!
	Models Analogue Input >> Analogue Output >> Thermocouple Input >> Digital I/O >> Solid State Relay >> Stepper Motor Driver >> Pulse/Counter/Timer >> RS232 Peripheral Interface >> ModCom Software >> USB to RS232 Interface >>
All Stack-DAQ modules incorporate two EIA/TIA-232E serial ports which communicate at 9600 baud, no parity, 8 data bits and 1 stop bit. DB9 connectors are jumpered to satisfy hardware handshaking. The port labeled ‘‘HOST’’ is configured as a DCE device and should be connected to a PC’s serial port. The port labeled ‘‘SLAVE’’ is a DTE device and can be left open, or connected to another module’s host port. Up to 32 modules can be chained together in this fashion to form a network. Either plugged together end to end, or separated by a cable. Because a module contains two individual bi-directional ports which pass data through, it also acts as a repeater, extending the total allowable length of the RS-232 communications line. Each Module in a network should be set to a different address using the on-board 32-position DIP switch. A module will only respond to data packets that begin with its’ own unique header character, which is determined by this DIP switch setting. Data packets transmitted by a module will also begin with this header character. The host PC can use the header character to address each individual module in a network, and to identify a module which is talking. And with the Windows™ Software, ModCom, setting up complex run-time applications could not have been easier. The novice or non-programmer will appreciate the ease at which eye-appealing display screens can be laid out very quickly, and the ability to perform complex functions with a minimal user learning curve. For stand alone controllers see CuBloc range of PLC
Models
SD-ADC - Analogue Input User Manual >> Top >>	8 input channels; supports single-ended, differential, or pseudo-differential modes. 12-bit plus sign A/D converter reads voltages from 0 to 4095 mV using 1 mV resolution. Two software programmable alarm trip-points for each input channel. All user configuration data (alarm trip-points) stored in non-volatile memory. Automatic self-calibrating and auto-zero upon power-up. DIP switch addressable; stack up to 32 modules on the same serial port for 256 single-ended inputs, or 128 differential inputs. Industry standard RS-232 interface. Wide power supply range (8 to 30 VDC). Screw-terminal connectors used on all inputs
NEW - SD-AIN - Programmable Analogue Input User Manual >> Top >>	4 differential input channels with a ±10V common mode range and protection to ±40V. 3 factory calibrated modes: +10.000 V to -8.000 V, ±600.0 mV, and ±600.00 mV. 2 user programmable modes which display readings in direct engineering units of choice. User programmable decimal point position. 20-bit A/D converter provides resolutions down to 1.4 µV (user programmable modes). 8-times averaging smoothes out readings. 5-Volt excitation output for bridge sensors. Software calibrated; no trim-pots to adjust. All user configuration and calibration data stored in non-volatile memory. Industry standard RS-232 interface. Wide power supply range (8 to 30 VDC). Screw-terminal connectors used on all inputs
SD-DAC - Analogue Output User Manual >> Top >>	4 analogue output channels that span -10.00 to +10.00 volts each. 12-bit DAC provides 0.01-volt output resolutions. Automatic generation of trapezoidal and S-curve slope profiles. User adjustable ramp-rate and S-curve magnitude. Individually selectable power-up / reset voltages for each output channel. Software calibrated; no trim-pots to adjust. All user configuration and calibration data stored in non-volatile memory. Separate RESET and PAUSE switch inputs. Industry standard RS-232 interface. Screw-terminal connectors used on all inputs and outputs
SD-TCI - Thermocouple Input User Manual >> Top >>	4 thermocouple input channels. DIP switch addressable; stack up to 32 modules on the same port for 128 inputs. Accepts J, K, T or E thermocouple types. Each channel individually selectable to read temperature in Fahrenheit or Celsius. Temperature conversions use high-order polynomial equations eliminating look-up table interpolation errors. Incorporates on-board CJC temperature sensor Thermocouple inputs protected to ±40 volts. Software calibrated; no trim-pots to adjust. All user configuration and calibration data stored in non-volatile memory. Industry standard RS-232 interface. Wide power supply range (8 to 30 VDC). Screw-terminal connectors used on all inputs
SD-DIO - Digital I/O User Manual >> Top >>	14 I/O channels; individually configured for input or output. All inputs incorporate a 100Kohm pull-up resistor to 5-volts. DIP switch addressable; stack up to 32 modules on the same port for 448 I/O points. Outputs can sink/source up to 25 mA each. Responds to button presses and switch transitions using automatic debounce and typematic repeat with adjustable delay. Decodes 4x4 matrix keypad using auto-debounce and typematic repeat. Turns on/off relays, triacs, switching transistors, etc. One-shot pulse output with software programmable length of 10 to 655,350 µS. Industry standard RS-232 interface. Wide power supply range (8 to 30 VDC). Screw-terminal connectors used on all inputs and outputs.
NEW - SD-DIN - Digital Input User Manual >>   Top >>	8 wide-range digital input channels with high voltage transient protection. 2 high-current open-collector output channels with automatic overload shutdown. DIP switch addressable; stack up to 32 modules on the same serial port to provide 256 inputs and 64 outputs. 8 event counter inputs with 24-bits each. 4 quadrature encoder inputs with 24-bits each. 4 tachometer inputs which read the speed of a rotating shaft from 200 to 400,000 RPM. Each input incorporates a pull-up resistor to 5 volts, simplifying hookup to switch contacts. Responds to button presses and switch transitions using automatic debounce and typematic repeat with adjustable delay. Turn on/off relays, solenoids, DC motors, etc., including PWM drive-current control. Each output incorporates a delay timer to allow momentary on/off or off/on activation. An output can be used as a watchdog timer to reset the host in case of lockup. Wide power supply range (8 to 30 VDC).
NEW - SD-DOT - Digital Output User Manual >>   Top >>	8 high-current open-collector output channels with automatic overload shutdown. 2 wide-range digital input channels with high voltage transient protection. DIP switch addressable; stack up to 32 modules on the same serial port to provide 256 outputs and 64 inputs. 2 event counter inputs with 24-bits each. 1 quadrature encoder input with 24-bits. 2 tachometer inputs which read the speed of a rotating shaft from 200 to 400,000 RPM. Turn on/off relays, solenoids, DC motors, etc., including PWM drive-current control. Each output incorporates a delay timer to allow momentary on/off or off/on activation. An output can be used as a watchdog timer to reset the host in case of lockup. Each input incorporates a pull-up resistor to 5 volts, simplifying hookup to switch contacts. Responds to button presses and switch transitions using automatic debounce and typematic repeat with adjustable delay. Wide power supply range (8 to 30 VDC).
SD-SSR - Solid State Relay User Manual >> Top >>	5 optically isolated solid state relays. DIP switch addressable; stack up to 32 modules on the same port for 160 relays. Wire relays directly to existing switches to allow software control of their operation. Control each relay individually or update all five relays as a group. Read current on/off state of relays from host. On-board relay closure indicator LEDs give visual confirmation of relay on/off states. Delay timer allows momentary relay closings and openings with a single command. Built-in sequencer for complex triggering. Set default state of each relay which will be loaded upon power-up. Industry standard RS-232 interface. Wide power supply range (8 to 30 VDC). Screw-terminal connectors used on all inputs outputs
SD-PCT - Pulse Counter/Timer User Manual >> Top >>	Reads frequency from 0.50000 to 1,500,000 Hz using 5 digit resolution throughout range. Reads period from 0.66666 to 2,000,000 µS using 5 digit resolution throughout range. Reads RPM from a single or multiple toothed shaft/pickup using 1 RPM resolution. Measures Duty cycle. Measures high or low pulse durations using 1 µS resolution. Calculate velocity of a projectile using two trip-wire inputs. Use trip-wire inputs of multiple units to plot acceleration/deceleration graphs. Industry standard RS-232 interface. Wide power supply range (8 to 30 VDC). Screw-terminal connectors used on all inputs.
SD-SMD - Unipolar Stepper Driver User Manual >> Top >>	Drives a unipolar stepper motor rated up to 30VDC @ 2A. DIP switch addressable; stack up to 32 modules on the same port for multiple axes. S-curve acceleration and deceleration slope profiles provide smooth start/stop motion. Software programmable ramp rate, velocity, and idle current. 24-bit absolute motor position counter. Normally-open limit switch input. Supports single phase, dual phase, and half-step drive modes. All user configuration data and motor position counter stored in non-volatile memory. Industry standard RS-232 interface. Meets all EIA/TIA-232E and V.28 specifications. Wide power supply range (8 to 30 VDC). Screw-terminal connectors used on all inputs and outputs.
NEW - SD-MCD - Bipolar Microstep Driver User Manual >>   Top >>	Drives a two-phase bipolar stepper motor using constant-current chopper regulation. DIP switch addressable; stack up to 32 modules on the same port for multiple axes. User programmable drive current and idle reduction current. Independent of power supply voltage. Select up to 64 microsteps per step. Up to 10,000 pps step rate. S-curve acceleration and deceleration slope profiles provide smooth start/stop motion. Supports move-to-coordinate, move-to-limit-switch, and continuous-rotation modes. 24-bit absolute motor position counter. Two normally-open limit switch inputs. All user configuration data stored in non-volatile memory. Automatic thermal shutdown protects motor driver Power MOSFETs from overheating. Industry standard RS-232 interface. Meets all EIA/TIA-232E and V.28 specifications. Wide power supply range (8 to 30 VDC). Screw-terminal connectors used on all inputs and outputs
SD-MPI - Multidrop Peripheral User Manual >> Top >>	Interface a third-party RS-232 peripheral with the Stackable Data Module's multi-drop bus. DIP switch addressable; stack up to 32 modules (hence peripherals) on the same RS-232 cable connected to a host PC. Appended header character allows host to communicate exclusively with each device. Supports peripheral baud rates of 150, 300, 600, 1200, 1800, 2400, 4800 and 9600. 122-byte RAM buffer used for data transfers. Supplies power to peripheral via DTR pin. Industry standard RS-232 interfaces used to connect to host and slave modules. Wide power supply range (8 to 30 VDC).
USB-232 USB to Serial Converter	USB to RS232 Converter Installs as Virtual Com Port 9-pin D mail commector 10 cm length 300 baud up to 230kBaud
Cables RS232 Cable - 2M
Software
By far, the most painless way to communicate with the Stack-DAQ Modules is to use ModCom, a GUI-based HMI development tool designed specifically for these modules and written for the Windows™ operating system. Regardless of whether you plan on using ModCom as your final operational platform, or if your needs require a custom program, ModCom is so easy to use that most customers turn to it as a starting base to get a feel for the Stack-DAQ Modules' functionality, communications protocol, and features. You can of course write your own software. RS232 Communications Protocol >> A full working / full feature demonstration copy of ModCom is available free of charge. To download the latest version of this software, click here >>
	communicates with Stack-DAQ modules Layout custom screens with ease - wide range of screen components; multiple screens chart recorder text Box data window status indicator with changing colour event timer push-button rocker switch slider integral data logging user selectable file name CSV format - import straight into Excel log rate from 1 second to days write control sequesnces using simple to use functions Conditional event monitoring such as alarms For Windows 95, 98, NT, ME, 2000, XP
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