6ES7321-7RD00-0AB0 SM321, 4DI, DC24V, HAZARDOUS AREAS

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6ES7321-7RD00-0AB0

		SIMATIC S7, DIGITAL INPUT SM 321, OPTICALLY ISOLATED, 4 DI, 24V DC, NAMUR/DIN 19234, F. SIGNALS F HAZARDOUS AREAS, CAPABLE OF DIAGNOST.,PTB-TESTED
Supply voltage
Load voltage L+
● Rated value (DC)		24 V
Input current
from load voltage L+ (without load), max.		50 mA
from backplane bus 5 V DC, max.		80 mA
Encoder supply
Output voltage		via the inputs
Power losses
Power loss, typ.		1.1 W
Digital inputs
Number of NAMUR inputs		4
Input voltage
● Rated value, DC		8.2 V; from internal power circuit supply
Input current
● on wire break, max.		0.1 mA
● on short -circuit, max.		8.5 mA
for NAMUR encoders
— for signal "0"		0.35 to 1.2 mA
— for signal "1"		2.1 to 7 mA
Input delay (for rated value of input voltage)
● Input frequency (with a time delay of 0.1 ms), max.		2 kHz
for NAMUR inputs
— Parameterizable		Yes; 0.1 / 0.5 / 3 / 15 / 20 ms (plus 0.25 ms preparation time)
Cable length
● Cable length unshielded, max.		200 m
Encoder
Connectable encoders
● NAMUR encoder		Yes; Two-wire connection
Interrupts/diagnostics/status information
Diagnostic messages
● Diagnostic information readable		Yes
Diagnostics indication LED
● Short circuit per channel (red)		Yes
● Short-circuit group error (red)		Yes
Ex(i) characteristics
Module for Ex(i) protection		Yes
Max. values of input circuits (per channel)
● Co (permissible external capacity), max.		3 µF
● Io (short-circuit current), max.		14.1 mA
● Lo (permissible external inductivity), max.		100 mH
● Po (power of load), max.		33.7 mW
● Uo (output no-load voltage), max.		10 V
Galvanic isolation
Galvanic isolation digital inputs
● Galvanic isolation digital inputs		Yes
● between the channels, in groups of		1
Standards, approvals, certificates
Use in hazardous areas
● Type of protection acc. to EN 50020 (CENELEC)		[EEx ib] IIC
● Type of protection acc. to FM		Class II, Division 2, Group A, B, C, D T4
● Test number PTB		Ex-96.D.2094X
Ambient conditions
Operating temperature
● max.		60 °C
Connection method
required front connector		20-pin
Weights
Weight, approx.		230 g
last modified:		25.09.2014