Model

SM 1231 Al 8x13bit

Order number

UN 231-4HF32-0XB0                            

General

Dimension W x H x D ( mm)

45x100x75                                              

Weight

180g

Power consumption

2.3W                                                        

Current consumption(SM bus)

90 mA

Current consumption(24V DC)

45mA                                                  

Analog input

Number of input channels

8                                                              

Type

Voltage or current (differential):

2 can be selected as a set

Range

±10V、±5V、±2.5V、0-20mA or 4-20 mA

Full scale range(data word)

-27648 -27648, voltage; 0-27648, current

Overshoot/undershoot range(data word)

Voltage：32,511-27,649/-27,649 --32,512

Current：32,511-27,649/0--4,864

Overflow/underflow (data word)

Voltage：32.767-32.512/-32.513 --32.768

Current 0-20mA:32,767-32,512/-4,865--32,768    

Current 4-20mA:32,767-32,512/When the value is less

than -4,864, it means an open circuit

Accuracy

12 bits + sign bit                                

Maximum pressure/current resistance

±35 V/±40 mA

Smooth

None, weak, medium or strong

Noise suppression

400、60、50 or 10 Hz

Impedance

≥9MQ(Voltage)/≥270Ω,<290Ω(Current)            

Isolation

Field side and logic side

Logic side with 24VDC

Field side with 24VDC

passages and passages

None

Accuracy(25℃/0-55℃)

±0.1%/±0.2% of full scale              

Common mode rejection

40 dB,DC-60 Hz

Working signal range

The signal plus common mode voltage must be less than +12V and greater than -12V

Cable length (meter)

100 meters, shielded twisted pair

Diagnosis

Overflow/underflow

√                                           

Short circuit to ground (voltage mode only)

Not applicable

Open circuit (current mode only)

4-20mA range only (if input below -4,864; 1.185mA)

24VDC low voltage

√