SNDJ-CNT Series Tachometers DESCRIPTION Honeywells CNT Series is the next generation of flexible and The G01/G02 and G03/G04 are supplied with full powerful tachometer products. Configured as either DIN rain or documentation and the CNT Windows software. This allows panel-mounted units, CNT Series products are suitable for the quick and easy configuration of all operating parameters, unit measurement, display, and control of speed in various interrogation of identity and parameters, PC display of current applications from diesel engines to windmills and escalators. measurement and relay status, and archiving and printing of They sense, monitor, discriminate, protect, diagnose, and the configuration. boost. FEATURES POTENTIAL APPLICATIONS Converts absolute speed into an analog signal Diesel engine start control and overspeed protection Including 2 limits (A/B) with programmable hysteresis Micro turbine measurement and protection One changeover relay assigned via binary input to limit (A Turbocharger speed measurement or B) Machine protection in safety critical applications G03 and G04 models with digital display Universal speed measurement and indication Isolated signal input with automatic trigger level adjustment Built in isolated sensor supply with sensor monitoring Open collector output of sensor frequency Accuracy class 0.05 % for limits and 0.5 % for analog signals Configuration and status via Windows software Wide tolerance 10 Vdc to 36 Vdc power supply SNDJ-CNT Series SPECIFICATIONS Parameter Characteristic Measuring range Lowest: 0 Hz to 1,000 Hz Highest: 0 Hz to 35 kHz Accuracy 0.5% referred to the analog output end of range value. Analog output G01/G03: current output 0 mA to 20 mA, resp. 4 mA to 20 mA G02/G04: voltage output 0 V to 10 resp. 2 V to 10 V Load G01: max 500 Ohm corresponding to a max. of 10 V Load G02: min. load 7 kOhm corresponding to a max. of 1.4 mA Maximum open circuit voltage 12 V Resolution 12 bit corresponding to 1:4096. Maximum linearity error 0.1 % Temperature drift 100 ppm/degree K typ., 300 ppm/degree K max. Set points/relay range See measuring range above Hysteresis for each limit an upper and a lower set point may be set independently Change over contact max. 250 Vac, 1250 VA (dc: see operating instructions) Data I/O Serial EIA RS 232 interface with +5V-CMOS level 3-pole. 3,5 mm stereo headphone connector on the front side, common reference potential with negative pole of sensor supply Measuring/response time The min. measuring time (fix time) is programmable: 2/5/10/20/50/100/200/500 ms, 1/2/5 s For input frequencies with a period SHORTER than the fix time: Analog output Max.: 2 tix time + max. period of the input frequency + 7.5 ms Typ.: fix time + 1 period of the input frequency + 7.5 ms Relay Max.: 2 fix time + max. period of the input frequency + 10.5 ms Typ.: fix time + 1 period of the input frequency + 10.5 ms For input frequencies with a period LONGER than the fix time: Analog output Max.: period of the input frequency + 7.5 ms Relay Max.: period of the input frequency + 10.5 ms Sensor input Input resistance: 30 kOhm Frequency range: (-3 dB): 0.01 Hz/35 kHz Trigger level: adaptive trigger level from 20 mV to 5 V or 500 mV to 5 V (factory configuration) peak depending on the amplitude of the input signal Sensor supply Built-in sensor power supply: +14 V, max 35 mA, short-circuit proof built-in pull up (+14 V) and pull-down (0 V) resistor 820 Ohm for connection of two-wire transmitters or daisy chaining of CNTs Sensor monitoring Powered 2 and 3 wire sensors: min. and max. current consumption values are selectable in the range 0.5 mA to 25 mA. Sensors with consumption below Imin. or above Imax. will be signaled as defective Electromagnetic/VR sensors: Open circuit state of sensors. This supervision runs permanently Both monitoring functions can be switched off via the configuration software Open collector output Galvanically separated output of sensor frequency. Binary inputs For external selection between two sets (A/B) of programmable relay control and acknowledge functions: (No external pull up needed) low active :U < +1.5 V high (open) :U > +3.5 V 2 www.honeywell.com/sensing
