EN
- Overview
- Specifications
- Description
- Environment and certification
- Applications
- Features and benefits
- Diagnostics
- Compatibility
- FAQ
- Recommended Products
Overview
Place of Origin: |
Sweden |
Brand Name: |
ABB |
Model Number: |
DI821 3BSE008550R1 |
Packaging Details: |
Original new Factory Sealed |
Delivery Time: |
5-7 days |
Payment Terms: |
T/T |
Supply Ability: |
In stock |
Specifications
|
Product Name: |
Digital Input Module |
|
Model: |
DI821 3BSE008550R1 |
|
Dimensions: |
16.5 x 16 x 8 cm |
|
Weight: |
0.32 kg |
|
Signal Specification: |
230 V AC, 220 V DC |
|
Number of Channels: |
8 |
|
Signal Type: |
Current sinking |
|
HART Support: |
No |
|
SOE Support: |
No |
|
Redundancy: |
No |
|
High Integrity: |
No |
|
Intrinsic Safety: |
No |
|
Mechanics: |
S800 |
|
Input Voltage Range "0": |
0..50 V AC, 0..40 V DC |
|
Input Voltage Range "1": |
164..264 V AC, 175..275 V DC |
|
Input Impedance: |
21 kΩ (AC) / 134 kΩ (DC) |
|
Isolation: |
Individually isolated channels |
|
Filter Times (digital, selectable): |
2, 4, 8, 16 ms |
|
Input Frequency Range: |
47..63 Hz |
|
Analog Filter On/Off Delay: |
5 / 28 ms |
|
Current Limiting: |
Sensor power can be current limited by the MTU |
|
Maximum Field Cable Length: |
200 m (219 yd) AC 100 pF/m, 600 m (656 yd) DC |
|
Rated Insulation Voltage: |
250 V |
|
Dielectric Test Voltage: |
2000 V AC |
|
Power Dissipation: |
Typ. 2.8 W |
|
Current Consumption +5V Modulebus: |
50 mA |
|
Current Consumption +24V Modulebus: |
0 |
|
Current Consumption +24V External: |
0 |
Description
The DI821 3BSE008550R1 is a 8 channel, 230 V a.c./d.c, digital input module for the S800 I/O. This module has 8 digital inputs. The ac input voltage range is 164 to 264 V and the input current is 11 mA at 230 V a.c. The d.c. input voltage range is 175 to 275 volt and the input current is 1.6 mA at 220 V d.c. The inputs are individually isolated.
Every input channel consists of current limiting components, EMC protection components, input state indication LED, optical isolation barrier and an analog filter (6 ms).
Channel 1 can be used as voltage supervision input for channels 2 - 4, and channel 8 can be used as voltage supervision input for channels 5 - 7. If the voltage connected to channel 1 or 8 disappears, the error inputs are activated and the Warning LED turns on. The error signal can be read from the ModuleBus.
Environment and certification
Applications
Large Substations and Power Plants
Analysis: Secondary control circuits in the power industry (such as circuit breaker positions and relay protection signals) typically use 110V DC power to ensure interference immunity. The DI821 can directly connect to these 110V signals without intermediate relays, simplifying cabinet wiring and improving response speed.
Steel and Mining Plants:
Analysis: In some long-established automated production lines, field sensors and limit switches use 110V DC as the control power supply. The DI821 is the optimal transition solution for upgrading such systems to 800xA/AC 800M.
Features and benefits
8 channels for 120 V a.c./d.c. inputs
Individually isolated channels
Voltage supervision of field input power
Input status indicators
Signal filtering
Diagnostics
Front LED’s: F(ault), R(un), W(arning), Channel 1-16 Status
Supervision: Process voltage, Channel 1 and 8 can be used per group
Status indication of supervision: Module Error, Module Warning, Channel error
Compatibility
Use with MTU: TU811, TU813, TU831, TU839, TU851
Keying code: AC
FAQ
Q1: Can the DI821 3BSE008550R1 be connected to 24V DC?
A: No. Its switching threshold is typically above 60V-70V. A 24V signal will be considered low, and the module will not respond.
Q2: Can DI821 3BSE008550R1 be connected to 110V AC?
A: Not recommended. Although some DC modules respond to AC, the DI821 3BSE008550R1 is designed for DC. Connecting it to AC may cause frequent signal flickering or module overheating. For AC applications, the DI820 should be used.
Q3: Why does the DI821 3BSE008550R1 only have 8 channels while the DI811 has 16?
A: High-voltage modules require greater creepage distance and more space for heat dissipation, therefore the channel density is reduced to ensure electrical safety.
Q4: Does DI821 3BSE008550R1 support Sequence of Events (SOE) recording?
A: No. 110V systems typically don't require 1ms latency tracking; for special needs, an intermediate adapter to the DI830 is necessary.
Q5: Why is the Fault LED on my DI821 3BSE008550R1 module lit?
A: Check the base address DIP switches or the backplane ModuleBus communication. If only a single channel is not working, it's usually due to a blown 110V fuse in the field.
