Mini-Max M235 & M245 Digital Panel Meters LCD LED * 3/64 DIN Indicator * Unique mounting bracket allows stacking of multiple units * Screw terminal connectors for easy installation * LCD: 3-1/2 or 4-1/2 digit, 0.5" high LCD display with optional negative image, bright red backlighting * LED: 3-1/2 digit, 0.56" high display * LED: 4-1/2 digit, 0.40" high display * Limited range display scaling 1 Rev. 11-19-13 Mini-Max M235 & M245 Digital Panel Meters Specifications LCD LED M235 M245 M235 M245 DISPLAY Type 7 segment Height Decimal Point (Selectable) 0.5" (12.7 mm) 3 position Overrange Indication Backlighting 0.56" (14.2 mm) 4 position 0.4" (10.2 mm) 3 position Most significant digit = "1" 4 position Blinking Display Optional negative image, Red Backlight Polarity N/A Auto with " - " indication, " + " implied POWER REQUIREMENTS AC Volt 85 - 250 VAC @ 40 - 440Hz DC Volt 9 - 32 DCV Not Available LCD 4.0 VA (2.4W ) Max. 3.6 VA (2.16W ) Max. LCD 3W Max Not Available POWER CONSUMPTION 85 - 250 VAC 9 - 32 DCV ISOLATION 250 VRMS Max ACCURACY @ 25 C 200 Hz 0.2% of input 0.2 Hz Not Available 2 KHz 0.2% of input 2 Hz DC V & A (0.1% of Reading 1 count) (0.04% of Reading 1 count) DC 2A (0.1% of Reading 1 count) (0.04% of Reading 1 count) (0.25% of Reading 1 count) DC 5A (0.5% of Reading 1 count) AC TRMS V & A (0.5% of Reading + 5 count) ( 50 Hz - 2 KHz ) (0.5% of Reading + 50 count) ( 50 Hz - 2 KHz ) DC Process (0.5% of Reading + 2 count) ( 50 Hz - 5 KHz ) (0.5% of Reading + 10 count) ( 50 Hz - 5 KHz ) (0.02% of Reading 1 count) EXCITATION CURRENT 25mA (Maximum) ENVIRONMENTAL 0 to 55C Storage Temperature -10 to 60C Relative Humidity 0 to 85% non condensing @ 40C Temperature Coefficient 0.2% of input 0.5 digits / C WARM-UP TIME Less than 20 minutes NOISE REJECTION CMRR 86 dB Typical A TO D CONVERSION Technique Integrating Dual Slope Rate 3 samples/second typical FREQUENCY METER Technique Frequency-to-voltage Not Available INPUT LEVEL (Frequency Meter) 500mV to 270 VRMS @ 1.0 Meg ohm or 5V to 24V SquareWave (DC offset = 2Vmax) Not Available MECHANICAL Bezel 0.95" x 2.84" (24 mm x 72 mm) Depth 2.36" (60 mm) Panel Cutout Weight Case Material 0.88" x 2.68" (22.2 mm x 68 mm) 3.5 oz. (99.2 g) 2.6 oz. (74 g) 94-0, UL-rated, glass-filled thermoplastic 2 Rev. 11-19-13 Mini-Max M235 & M245 Digital Panel Meters Inputs DC Voltage Resolution M235 Resolution M245 Input Impedance 200mV 100V 10V 10MEG 100VDC 2V 1mV 100V 10MEG 250VDC 20V 10mV 1mV 10MEG 250VDC 200V 100mV 10mV 9.9MEG 250VDC 600V 1V 100mV 9.9MEG 600VDC Range Max Input Unfused DC/AC TRMS Current Resolution Range M235 LCD M245 Voltage Drop LED Max Input Unfused Voltage Drop Max Input Unfused 200A 100nA 10nA 200mVDC 10mA 200mVDC 6mA 2mA 1A 100nA 200mVDC 40mA 200mVDC 20mA 20mA 10A 1A 200mVDC 100mA 200mVDC 60mA 200mA 100A 10A 200mVDC 400mA 200mVDC 300mA 2A 1mA 100A 200mVDC 3A 200mVDC 2.6A 5A 10mA 1mA 50mVDC 6A 100mVDC 6A Resolution M235 Resolution M245 Input Impedance 100V 10V 500K 10VAC AC TRMS Voltage Range 200mV Max Input Unfused 2V 1mV 100V 100K 100VAC 20V 10mV 1mV 1MEG 200VAC 200V 100mV 10mV 1MEG 200VAC 270V 1V 100mV 1MEG 270VAC 600V 1V 100mV 9.9MEG 600VAC Resolution M235 Resolution M245 0.1% 0.01% DC Process Range 4 to 20mA Voltage Drop 200mVDC Max Input Unfused 60mA Input Impedance 1 to 5VDC 0.1% 0.01% 10 MEG 250VDC 0 to 10VDC 0.1% 0.01% 10MEG 250VDC 0 to 100VDC 0.1% 0.01% 10MEG 250VDC 3 Rev. 11-19-13 Mini-Max M235 & M245 Digital Panel Meters Ordering Information - Mini-Max indicators can be configured by making an entry in each section below. Example: M245-1-0-71-0. _____ _____ _____ _____ I I I I I Basic Unit Display DPM Power Supply Function/ Range Excitation Output Select From Each One Below Select From Each One Below Basic Unit M235 3-1/2 Digit M245 4-1/2 Digit Function / Range (continued) 31 200 VAC TRMS * 32 2 VAC TRMS 33 20 VAC TRMS Display 34 200 VAC TRMS 0 Non Backlit (LCD) 36 270 VAC TRMS 1 Negative Red Backlight (LCD) 35 600 VAC TRMS 2 Red (LED) 41 200 ACA TRMS 42 2 ACmA TRMS 85 - 250 ACV 43 20 ACmA TRMS 9 - 32 DCV 44 200 ACmA TRMS 45 2 ACA TRMS 46 5 ACA TRMS DPM Power Supply 0 2 * & ** Function / Range * ** *** ** 11 200 DCmV 12 2 DCV 71 4 - 20 DCmA ( DC Process ) 13 20 DCV 72 1 - 5 DCV ( DC Process ) 14 200 DCV 73 0 - 10 DCV ( DC Process ) 15 600 DCV 81 20 - 199.9 Hz RMS 21 200 DCA 82 20 - 1999 Hz RMS 22 2 DCmA 83 20 - 199.9 Hz Sq. Wave 23 20 DCmA 84 20 - 1999 Hz Sq. Wave 24 200 DCmA 25 2 DCA 26 5 DCA ** ** ** ** & & & & *** *** *** *** Excitation Output Not Available on Frequency (Hz) Meters Not Available on LED Display Not Available on M245 0 None 1 12 DCV @ 25mA 2 24 DCV @ 25mA * * Not Available on LCD Display 4 Rev. 11-19-13 Mini-Max M235 & M245 Digital Panel Meters Dimensions - M235, M245 & M240 Mounting Requirements Insert the Mini-Max through the panel, and then slide the mounting bracket on to the Mini-Max. The mounting bracket allows Mini-Max units to be stacked side-to-side or top-to-bottom. Panel cutout instructions for stacking multiple units are provided in the operator's manual. 5 Rev. 11-19-13