Model

EM221  
8 inputs

EM221  
16 inputs

EM221  
32 inputs

Product  Description

8DI,24VDC;
Optical isolation 
with high immunity

16DI,24VDC;
Optical isolation 
with high immunity

32DI,24VDC;
Optical isolation 
with high immunity

From bus current consumption

40mA

85mA

140mA

Power loss

2W

3W

5.2W

Number of digital inputs

8

16

32

Signal input type·

PNP/NPN

PNP/NPN

PNP/NPN

Input voltage range

24V DC,4mA

24VDC,4mA

24V DC,4mA

Maximum input voltage

30V DC

30V DC

30V DC

Surge voltage

35V DC,0.5s

35V DC,0.5s

35V DC,0.5s

Logic 0 signal 

0~5V DC

0~5V DC

0~5V DC

Logic 1 signal 

15~30V DC

15~30V DC

15~30V DC

Input delay(max)

4.5ms

4.5ms

4.5ms

Optical isolation(Galvanic)  
(Field Side to Logic)

500 V AC for 1 minute

500 V AC for 1 minute

500 V AC for 1 minute

Premissible leakage current(Bero)

1mA

1mA

1mA

Cable Length

500m(Shielded )
300m(Unshielded)

500m(Shielded )
300m(Unshielded)

500m(Shielded) 
300m(Unshielded)

Dimensions(W x H x D)(mm)

46×80×62

71.2×80×62

137.5×80×62

Order Number

UN 221-1BF22-0XA0

UN 221-1BH22-0XA0

UN 221-1BL22-0XA0