Model 7541 AC Carrier or DC Strain Gage Conditioner Indicator DESCRIPTION These advanced instruments provide engineering unit display The alphanumeric readout can display measured and computed of a strain gage (mV/V) input and a frequency input. They also data, units of measure, and test status. During setup, it guides compute power and perform 21 functions including limit checks, you with English language prompts. There are no manual adjust- tare, hold and max./min. capture. You needn’t write code or add ments. To calibrate, enter the full scale value in engineering units hardware to be up and running a productive test. and auto-cal takes over. Provides 0.01 % (max.) resolution and ±5 V and/or ±10 V analog outputs at full scale. The keyboard accesses measured data, held data, max./min. data, data spread, limit status, and/or I/O status without disruption. Password protection may be used, if needed. FEATURES Order code • May be calibrated in two directions (clockwise and counter- 7541-111 ac excitation, single display clockwise or tension and compression) 7541-112 ac excitation, dual display (two inputs) Fast, rock-solid readings with high noise immunity - 2000 7541-115 ac excitation, torque, RPM, hp (displays 2 of the 3) samples/sec for torque, head, or drawbar force input - 1 ms 7541-101 dc excitation, single display response for speed 7541-102 dc excitation, dual display (two inputs) • One or two channel input 7541-105 dc excitation, torque, RPM, hp (displays 2 of the 3) • Six-digit engineering unit with legends and 0.01 % resolu- • tion max. • RS-232, RS-422, RS-485 serial communication • Auto-scaled ±5 V and/or ±10 V analog outputs • No pots, batteries, fans, maintenance, or external power supplies • Excitation: ac carrier models, 3.28 kHz, 3 V rms; dc models, 5 V or 10 V dc, user selectable • CE approved Model 7541 General SPECIFICATIONS Characteristic Strain gage input ENVIRONMENTAL SPECIFICATIONS Measure Characteristic Measure Any 80 ohm to 2K ohm transducer, directly wired or transformer coupled. 4, 6, or 7 wire circuits are accommodated Temperature effects, zero ±0.001 % of full scale/°F max. Temperature effect, span ±0.001 % of full scale/°F max. Frequency input Any unidirectional or bidirectional (quadrature) source including selfgenerating and zero velocity magnetic pickups, optical encoders, flowmeters, etc. When used with bidirectional sensors, the conditioner outputs both direction and magnitude Input impedance and configuration Differential or single ended inputs. 100 kohm differential, 50 kohm single ended Input threshold (keypad selectable) 10, 20, 50, 100 or 200 mV pk-pk (between inputs) or TTL Maximum voltage ±130 Vdc or 130 Vrms Input signal bandwidth 0.001 kHz to 200 kHz (10 mV to 200 mV pk-pk threshold) 0.001 kHz to 400 kHz (TTL threshold) Display ranges and resolution Rangeless (use any full scale engineering unit value) with 50 % overrange. Resolution is 0.01 % of full scale Low pass filter (keypad selectable) 20 kHz (-3 dB) or none (this filter is not available for TTL inputs) Response time Greater of: 1 ms, typ (2 ms worst case) or the input pulse length Common mode rejection 80 dB (60 Hz), 55 dB (0 kHz to 10 kHz) Low pass filtering of sampled data Unfiltered or four-pole Bessel filter. Cutoff frequencies from 0.1 Hz to 100 Hz in 1-2-5 steps Overall accuracy 0.01 % of full scale @ 25 °C [77 °F], 0.015 % of full scale @ 5 °C to 50 °C [41 °F to 122 °F] Excitation supplies 12 V @ 125 mA2 or 5 V @ 250 mA2. Short circuit (current limit and overvoltage (fuses) protected Maximum transducer cable length 500 ft, except 200 ft for 100 ohm or lower strain gage transducers Transducer excitation, ac models 3 Vrms, 3.28 kHz ±0.01 % sine wave. Regulated and short circuit protected Transducer excitation, dc models 5 V or 10 V dc, user selectable, regulated Sensitivity 1.0 mV/V to 4.5 mV/V with 50 % overrange; automatically scaled Input resistance 100 mohm in parallel with 33pF Automatic null In Phase: ±10 % of full scale (with 50 % overrange), ±60 % of full scale (with 0 % overrange). Quadrature: ±1 mV/V Auto calibration Dual polarity shunt calibration with provision for CAL resistor feedback Spurious signal rejection 60 Hz: 120 dB common mode, 100 dB normal mode. Carrier quadrature: 60 dB Anti-alias filter 200 Hz, 7-pole Bessel response filter Low-pass filtering Four-pole Bessel response digital filter with 11 cutoff frequencies from 0.1 Hz to 200 Hz in 1-2-5 steps ELECTRICAL SPECIFICATIONS Characteristic Measure Signal-to-noise ratio1 With 1/10/100/200 Hz filters 86/76/66/62 dB @ 1 mV/V full scale and 86/80/72/66 dB @ 5 mV/V FS Resolution 0.01 % of full scale Overall accuracy @ 25 °C [77 ºF] 0.02 % of full scale, worst case. DISPLAY SPECIFICATIONS Characteristic Measure System display Two line by 16 alphanumeric characters, each 0.2 in wide by 0.3 in high. Backlit LCD with adjustable contrast Views Select either two channels, one Channel with limit status or one channel with I/O status Data displayed Select from current, max., min., spread, held data and tare value Data format Engineering units with six digits (1-2-5 format) and five character, upper or lower case, user-entered legend/descriptor 2 Honeywell • Sensing and Control System response (per channel) SPECIFICATIONS Characteristic Measure Data samp. & max./min. update rates 2000 Hz (hardware channels), 50 Hz (CH3 calculation) Limit checking rate 1000 Hz (hardware channels), 50 Hz (CH3 calculation) Logic I/O response time 1 ms (hardware channels), 20 ms (CH3 calculation) Update rate for each analog output 1000 Hz AC Carrier Strain Gage Conditioner Indicator System SPECIFICATIONS Logic inputs SPECIFICATIONS Characteristic Measure Characteristic Measure System control All I/O functions can be ordered in any combination. The pattern function adds ANDing capabilities Four Logic inputs Each with programmable destination, protected to ±130 Vdc or 130 Vrms Four Logic type Input actions/channel Logic inputs, outputs and internal Matrix signals control the following actions: tare, clear tare, hold, clear hold, reset max./min., clear latched limits, check limits, do max./mins., apply +CAL TTL compatible, Scmitt Trigger, low-true with 47 kohm pull-up. Input current is -100 µA @ 0 V Six Logic outputs Each with programmable source, short circuit (current and thermal limits) and overvoltage (fuse) protected. The following events drive logic outputs and internal Matrix signals: HI limit, NOT HI limit, IN limit, NOT IN limit, LO limit, NOT LO limit, at max., NOT at max., at min., NOT at min. Six Logic type Open collector, low-true. Operating @ 24 V (max.) and 0.3 A max sink current External +5 Vdc power (on I/O conn.) 250 mA, short circuit (current limit) and overvoltage (fuse) protected. Three user-defined patterns Patterns of logic inputs, outputs and Matrix signals drive Logic outputs and internal Matrix signals Serial communication port (selectable as RS232, RS422 or RS485) Supports 32 devices on RS485 port and 1 device on RS232/422 Limit Checking Each channel has a HI and LO limit which may be latched or unlatched, absolute or signed, and with or without hysteresis. Select either current, max., min. spread or held data for limit checking. Limit violations on any or all channels can be set to trigger backlight flashing in any of the display view modes Baud rate 300 to 38400. Maximum cable length: 4000 ft (RS422/RS485), 50ft (RS232) 120 ohm terminal resistors (RS485) User selectable for RXD and TXD RS422/485 transceivers Slew-rate limited, short circuit protected (current and thermal limits) RS232 drivers Short circuit protected (current limit) Serial I/Os Use a nine-pin D connector. ±15 kV ESD protected and float (100 kohm) with respect to earth ground Commands Control of all modes, settings and measurements Non-volatile memory storage settings EEPROM, batteries are not used Dual analog outputs Each assignable to any of the three channels are short circuit (current limit) and overvoltage (fuse) protected Output impedance/min. load resis. < 1 ohm/10 kohm Full scale ±5 V or ±10 V (user selectable). Resolution is 2 mV @ ±5 V full scale or 4 mV @ ±10 V full scale Overrange ±8.2 V @ ±5 V full scale or ±13.5 V @ ±10 V full scale Nonlinearity ±2 mV @ ±5 V full scale or ±4 mV @ ±10 V full scale Output events/channel Mechanical SPECIFICATIONS Characteristic Measure Size (W x H x D) 165,1 mm x 73,66 mm x 220,98 mm [6.5 in x 2.9 in x 8.7 in] Weight 3 lb Operating temperature 5 °C to 50 °C [41 °F to 122 °F] Input power 90 Vac to 250 Vac, 50/60 Hz @ 25 VA, max. Two 2 A/250 V fuses, line filter and rear power switch Overall error (worst case, incl. temp. effects) Filter ±5 mV @ ±5 V full scale or ±10 mV @ ±10 V full scale 100 Hz, 5 pole Bessel response low pass filter Honeywell • Sensing and Control 3 Model 7541 AC Carrier Strain Gage Conditioner Indicator Notes 1. The ratio expressed in decibels (dB), of full scale (FS) to noise spread. Measurements are made for a one-minute interval using a 350 ohm bridge. 2. Both excitation voltages can be used simultaneously with the following restrictions: 4.8 x (12 V current) + (5 V current) < 700 mA; 12 V current < 125 mA; 5 V current < 250 mA. 3. Applies to strain gage channel only. Frequency measurement is absolute with enhanced accuracy and only requires user engineering unit scale. 4. Specification is subject to change without notice. Warranty. Honeywell warrants goods of its manufacture as being free of defective materials and faulty workmanship. Honeywell’s standard product warranty applies unless agreed to otherwise by Honeywell in writing; please refer to your order acknowledgement or consult your local sales office for specific warranty details. If warranted goods are returned to Honeywell during the period of coverage, Honeywell will repair or replace, at its option, without charge those items it finds defective. The foregoing is buyer’s sole remedy and is in lieu of all warranties, expressed or implied, including those of merchantability and fitness for a particular purpose. In no event shall Honeywell be liable for consequential, special, or indirect damages. While we provide application assistance personally, through our literature and the Honeywell web site, it is up to the customer to determine the suitability of the product in the application. Specifications may change without notice. The information we supply is believed to be accurate and reliable as of this printing. However, we assume no responsibility for its use. For more information about Sensing and Control products, visit www.honeywell.com/sensing or call +1-815-235-6847 Email inquiries to [email protected] WARNING PERSONAL INJURY •DO NOT USE these products as safety or emergency stop devices or in any other application where failure of the product could result in personal injury. Failure to comply with these instructions could result in death or serious injury. WARNING MISUSE OF DOCUMENTATION •The information presented in this catalogue is for reference only. DO NOT USE this document as product installation information. •Complete installation, operation and maintenance information is provided in the instructions supplied with each product. Failure to comply with these instructions could result in death or serious injury. Sensing and Control Automation and Control Solutions Honeywell 1985 Douglas Drive North Golden Valley, MN 55422 USA +1-815-235-6847 www.honeywell.com/sensing 008816-2-EN IL50 GLO December 2008 Copyright © 2008 Honeywell International Inc. All rights reserved.