Ex digital input modules . Технические данные . Подробное описание, цены на оборудование Siemens. Большой выбор, низкие цены на Ex digital input modules

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Article number		6ES7321-7RD00-0AB0
		SM321, 4DI, DC24V, HAZARDOUS AREAS
Supply voltage
Load voltage L+
в—Џ Rated value (DC)		24 V
в—Џ Reverse polarity protection		Yes
Input current
from load voltage L+ (without load), max.		50 mA
from backplane bus 5 V DC, max.		80 mA
Encoder supply
Type of output voltage		via the inputs
Power loss
Power loss, typ.		1.1 W
Digital inputs
Number of NAMUR inputs		4
Input voltage
в—Џ Rated value (DC)		8.2 V; from internal power circuit supply
Input current
в—Џ on wire-break, max.		0.1 mA
в—Џ on short-circuit, max.		8.5 mA
for NAMUR encoders
вЂ” for signal "0"		0.35 to 1.2 mA
вЂ” for signal "1"		2.1 to 7 mA
Input delay (for rated value of input voltage)
в—Џ Input frequency (with a time delay of 0.1 ms), max.		2 kHz
for NAMUR inputs
вЂ” Parameterizable		Yes; 0.1 / 0.5 / 3 / 15 / 20 ms (plus 0.25 ms preparation time)
Cable length
в—Џ unshielded, max.		200 m
Encoder
Connectable encoders
в—Џ NAMUR encoder		Yes; Two-wire connection
Interrupts/diagnostics/status information
Diagnostic functions		Yes
Diagnostic messages
в—Џ Diagnostic information readable		Yes
Diagnostics indication LED
в—Џ Group error SF (red)		Yes
в—Џ Status indicator digital input (green)		Yes
в—Џ Channel fault indicator F (red)		Yes
Ex(i) characteristics
Module for Ex(i) protection		Yes
Maximum values of input circuits (per channel)
в—Џ Co (permissible external capacity), max.		3 µF
в—Џ Io (short-circuit current), max.		14.1 mA
в—Џ Lo (permissible external inductivity), max.		100 mH
в—Џ Po (power of load), max.		33.7 mW
в—Џ Uo (output no-load voltage), max.		10 V
Potential separation
Potential separation digital inputs
в—Џ Potential separation digital inputs		Yes
в—Џ between the channels, in groups of		1
Standards, approvals, certificates
Use in hazardous areas
в—Џ Type of protection acc. to EN 50020 (CENELEC)		[EEx ib] IIC
в—Џ Type of protection acc. to FM		Class II, Division 2, Group A, B, C, D T4
в—Џ Test number PTB		Ex-96.D.2094X
Ambient conditions
Ambient temperature during operation
в—Џ max.		60 °C
Connection method
required front connector		20-pin
Weights
Weight, approx.		230 g