Technical data
SIMATIC S7-300, Digital input SM 321, Potential Isolation 16 digital input, 24V DC, M Read, 1 20 pins
Supply voltage
Load voltage L+
● Rating (DC) 24 V
● Allowable range, lower limit (DC) 20.4V
● Allowable range, upper limit (DC) 28.8V
Input current
From the backplane bus DC 5 V, *** Max 10 mA
Power loss
Power loss, typical value 3.5W
Digital input
Number Number of input terminals 16
Input characteristics comply with IEC 61131, type 1 is
The number of inputs that can be controlled simultaneously
Horizontal mounting position
- *** high up to 40 ℃, *** maximum value 16
- *** high up to 60 ℃, *** maximum value 16
Vertical mounting position
- *** high up to 40 ℃, *** maximum value 16
Input voltage
● Input voltage type DC
● Rating (DC) 24 V
● For signal "0" -5 to +30V
● For signal "1" -13 to -30V
Input current
● For signal "1", the typical value is 7 mA
Input delay (when input voltage is rated)
For standard input
- Parameterized no
- When the value ranges from 0 to 1, the minimum value is 1.2 ms
- When the value ranges from 0 to 1, the maximum value is 4.8 ms
- When the value ranges from 1 to 0, the minimum value is 1.2 ms
- When the value ranges from 1 to 0, the maximum value is 4.8 ms
Conductor length
● Shielding, maximum value 1 000 m
● Unshielded, maximum value 600 m
sensor
Connectable sensor
● Double wire sensor is
- Allowed closed circuit current (dual wire sensor) *** Max 1.5mA
Alarm/diagnosis/status information
Alarm no
Diagnostic function No
alarm
● Check whether the alarm is generated
● Process alarm No
Diagnostic display LED
● Digital input status display (green) Yes
Potential isolation
Digital input potential isolation
● Between channels no
● Between channels, group the number of points 16
● Between the channel and backplane bus is; Photoelectric coupler
insulation
Insulation test, using DC 500 V
Connect technology/title
Required front plug 20 pins
dimension
Width 40mm
Height 125 mm
Depth 120 mm
weight
Weight, about 200 g
FAQ
1.Who are We?
Beijing Zhongping Technology Co., LTD., is a one-stop integrated service provider of intelligent manufacturing, belongs to the Gong Doctor Group, is a scientific research, design, marketing, technical services, industrial Internet, international import and export services as one of the science and technology companies.
2.What can you buy from us?
PLC, inverter, human-machine interface, hydraulic products, low-voltage power distribution, industrial robots and core components
3.Is the item in stock or need to be purchased from another supplier?
We have a large inventory of goods and have our own warehouse.
4.What advantages do we have over other suppliers?
Our company has a large amount of inventory and a number of warehouses, but also in the country's important industrial provinces and cities with offices and a number of overseas service points. To provide you with intelligent manufacturing one-stop comprehensive services, save efforts, labor and cost.
5.Can you provide 100% new original authentic products?
We only sell new original genuine, no renovation, no fake, only for the original factory original!
6.How long is the delivery time?
If there is a stock, it will take 2-3 working days to ship, if the quantity is large, it will take 5-7 working days after receiving the payment, if it is not a conventional model, it will take some time, we will inform you of the specific delivery time.
7.Is there technical support available?
Of course, we have a professional technical team that can help you solve technical problems.
8.How do we guarantee quality?
We have three processes to control the quality of goods.
1). Our engineers will inspect the production and quality control in the factory regularly.
2) Incoming materials shall be inspected by experienced purchasing engineers before they can be stored.
3). At least 2 people in the logistics department cross-check the goods to be sent before delivery.
9.Can you guarantee the safe and reliable delivery of your products?
Yes, we strictly adopt the international standard packing. We also use special packaging for dangerous goods, and refrigerated shipping for items with temperature requirements. Special item packaging and general cargo standard packaging requirements may incur additional costs.
10.How about the freight?
The cost depends on how you choose to get the goods. Express is usually the fastest but also the most expensive way. Sea freight is the best solution for large quantities of goods. The exact shipping cost depends on the purchase amount、quantity and weight of your order. Please feel free to contact us for more information.
010-64225983
+8613811814778
info@zhongpingtech.com
Building 26, Liyuan Community, Chaoyang District, Beijing, China
