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Digital Meter Relay PSM-215A Series

  • Small case in DIN size [48mm (W) x 24mm (H) x 88mm (D)]
  • Front panel operating digital scaling
  • Hi-Lo comparison output (relay photo coupler)
  • RoHS compliant

■Input Specification

DC Current Measurement

Range Measurement Range Display Input Impedance Maximum Allowable Input
11 ±99.99mV Offset ±9999
Full scale ±9999
100MΩ or more ±50V
12 ±999.9mV 100MΩ or more ±50V
13 ±9.999V Approximately 1MΩ ±50V
1V 1 to 5V Approximately 1MΩ ±50V

*Accuracy:±(0.03% of rdg + 2digit) (at 23℃ ± 5℃)

DC Current Measurement

Range Measurement Range Display Input Impedance Maximum Allowable Input
2A 4 to 20mA Offset ±9999
Full scale ±9999
Approximately 50Ω ±50mA

*Accuracy:±(0.1% of rdg + 2digits) (at 23℃ ± 5℃)
*For each range, the accuracy is applied at (FSC-OFS)/(FIN-OIN) ≤ 1.

■Comparison Part Specification

Control MethodMicrocomputer calculation method
Setting Range-9999 to 9999
Comparison OperationDepends on sampling speed
Setting ConditionFor higher and lower limits judgment (HI-GO-LO), higher limit judgment value > lower limit judgment value
For higher and higher limits judgment (HH-HI-GO), higher higher limit judgment value > higher limit judgment value
For lower and lower limits judgments (GO-LO-LL), lower judgment value > lower lower judgment value
Hysteresis1 to 999 digits can be set for each comparison judgment value

●Comparison Condition

Higher and Lower Limits Judgment (HI-GO-LO)

Comparison Condition Judgment Monitor Comparison Output
AL1 AL2 OUT1 OUT2 OUT3
Measurement value > higher limit judgment valueON ON OFF ON ON
Lower limit judgment value ≤ measurement value ≤ higher limit judgment valueOFF OFF OFF ON OFF
Lower limit judgment value > measurement value ON OFF ON OFF OFF

Higher Higher Judgment (HH-HI-GO)

Comparison Condition Judgment Monitor Comparison Output
AL1 AL2 OUT1 OUT2 OUT3
Measurement value > higher higher limit judgment value ON ON OFF ON ON
Measurement value > higher limit judgment value ON OFF OFF ON OFF
Higher limit judgment value ≥ measurement value OFF OFF ON OFF OFF

Lower Lower Judgment (GO-LO-LL)

Comparison Condition Judgment Monitor Comparison Output
AL1 AL2 OUT1 OUT2 OUT3
Measurement value ≥ lower limit judgment value OFF OFF OFF OFF ON
Lower limit judgment value > measurement value OFF ON OFF ON OFF
Lower lower limit judgment value >measurement value ON ON ON ON OFF

●Relay Contact Output (parallel use with photo coupler output is not available)

Output Rating DC24V 1A(resistance load)

●Photo Coupler Output (parallel use with relay contact output is not available)

Output Rating DC30V 50mA
Output Saturation Voltage 1.2V or less (at 50mA)

■General Specification

Measurement Function One of DC voltage or DC current (single range)
Input Circuit Single ended
Operation Method ΔΣConversion Method
Sampling SpeedMax. 25 times/second
Display Red 7 segments LED display (height of character 8mm)
Polarity Display "-" is displayed when the calculation result is negative
Over Range WarningoL or –oL is displayed for input signal of display range or more
Max. Display ±9999 (full 4 digits)
Decimal Point Can be set at arbitrary position by front face sheet switch
Zero Display Leading zero suppress
Backup Setting data is stored in EEPROM (number of writings is 100,000 times)
Operating Temperature & Humidity 0 to 50℃/35 to 85%RH (no dew condensation)
Storage Temperature & Humidity -20 to 70℃/60%RH or less (no dew condensation)
Power Supply Voltage DC 24V ± 20%
Power Consumption Approximately 4W
External Dimensions 48mm(W)×24mm(H)×87.8mm(D) * Screw terminal included
Weight Approximately 100g
Withstand Voltage Between power supply terminal and input terminal, between each output terminal DC 500V, one minute
Between input terminal and each output terminal DC 500V, one minute
Between case and power supply terminal, input terminal, between each output terminal AC1500V, one minute
Insulation Resistance Between case and power supply terminal, input terminal, between each output terminal AC1500V, one minute
Accessory Instruction manual, attachment band, unit sticker

■External Control Part

Digital ZeroDigital zero is turned ON by short-circuiting DZ terminal and COM terminal or same electric potential

■External Power Supply Part

Rating DC24V±5%
Maximum Load 25mA

■Optional Specification

●RS-485 Part (mounting with analog output at once is not available)

Simultaneous MethodAsynchronous method
Communication MethodCommunication Method
Transmission Speed38,400bps/19,200bps/9,600bps/4,800bps/2,400bps
Start Bit1 bit
Data Length 7 bits/8 bits
Parity Bit Even parity / odd parity / no parity
Error DetectionBCC (Block Check Character) check sum
Stop Bit 1 bit / 2 bits
Character Code ASCII code
Delimiter CR/CR + LF
Transmission Control Procedure No procedure
Name of Used Signal Noninversion (+), inversion (-)
Number of Connected Meters Max. 31 meters
Length of Line Max. 500m (total)

●Analog Output Part (mounting with RS-485 at once is not available)

Output SpecificationOutput Specification
Output SpecificationType Load Resistance Accuracy Ripple
4 to 20mA 0 to 250Ω ±(0.5% of FS ) 25mVp-p or less
0 to 10V 10KΩ or more ±(0.5% of FS ) 50mVp-p or less

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