TERN DataWatch NEC V25 16 bit CPU [x86 compatible] 8MHZ C/C++ Programmable Controller, 4 channels 12-bit DAC, 14 solenoid drivers, 11 12-bit ADC, 2 RS232 and 1 RS485, LCD interface
The DW is designed for industrial and field applications that demand mobility. The 96 (24x4) optional field-removable screw terminals of the DW allow a unit to be placed and removed without disconnecting individual wires, which relieves the constant hassle of swapping, moving, and upgrading a system. This feature saves time and minimizes disastrous cross-wiring. The factory default configuration provides fixed terminals, if the optional field-removable terminals are not needed.
At the 24x4 screw terminals, the DW provides 16 TTL inputs, 8 comparator inputs, 14 solenoid drivers, and 8 bi-directional TTL I/Os with LED indicators.
The 16 TTL inputs are buffered by two PALs and can be configured as multiplexed events counter inputs, external interrupt inputs or digital inputs. An on-board PPI (82C55) drives 14 solenoid drivers and 8 bi-directional TTL I/Os. Eight resistor-protected comparators can be used to measure either digital or analog inputs (0 to 10V) in 16 levels.
An optional 11 resistor-protected 12-bit ADC inputs and four 12-bit DAC outputs can be installed on the DW. The ADC (TLC2543) features reference inputs (2.5V or 5V), a sample rate of up to 2.5 kHz, and a 0-10V input voltage range. The DAC (MAX537) outputs 0V to 2.5V, with a typical slew rate of 3V/s with a 5 kW load. The DAC is installed with a 2.5V precision reference (20 ppm/° C, LT1009).
The 14 solenoid drivers can sink up to 350 mA each at 50V.Two RS-232 serial ports support up to 115,200 baud. One optional UART (SCC2691) supports 8-bit/9-bit RS-485 networking. Two standby modes, HALT and STOP, can reduce power consumption. A 16-pin LCD interface header supports various types of LCDs.
Ordering Information (Qty 1/100/1K+)
Includes NEC V25, 2 RS-232, 3 timers, comparators, 14 solenoid drivers, 8 I/Os from 82C55 PPI, watchdog, LCD interface, 512-byte EEPROM, and 24x4 FIXED screw terminals. Does not include add-on options. OEM option discounts available.
|1) SRAM: 32KB/128KB/512KB||$8/$15/$40|
|2) Debug ROM (TDREM_V25)||$30|
|3) Real-time clock and battery||$20|
|4) Low-power version||$25|
|5) UART (SCC2691) and RS-485 driver||$30|
|6) 11 ch. 12-bit ADC||$30|
|7) 4 ch. 12-bit DAC (MAX 537) w/ 2.5V reference||$80|
|8) 24x4 field-removable screw terminals||$80|
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