6ES7322-1BL00-0AA0 Siemens Simatic S7-300 Digital I/O Module

Product parameters

Output channels: 8 independent digital output channels, transistor (NPN) type, only supports DC load

Load voltage: 24V DC (Standard industrial DC load voltage, no AC compatibility capability)

Load current: Maximum 2A for a single channel (far exceeding the conventional transistor module, medium and high power driving capability), maximum total current of 4A for every 4-channel group, maximum total current of 8A for the entire module (balanced load distribution in groups, compatible with multiple medium power devices)

Switching frequency: Maximum 10 Hz under resistive load, maximum 0.5 Hz under inductive load (focusing on stable driving, not in high-frequency switching scenarios)

Electrical isolation: Photoelectric coupling isolation between the channel and the backplane bus. Four channels are grouped for isolation. Anti-electromagnetic interference (EMC) complies with EN 61000-6-2/3 standards, suitable for complex industrial electromagnetic environments

Power loss: The typical power consumption is approximately 6W, and the no-load power consumption is about 2.5W, which is suitable for the energy consumption requirements of medium-power drives

Protection grade: The front-end protection grade of the module is IP20 (suitable for installation in industrial control cabinets)

Working environment: Working temperature 0℃ to 60℃, storage temperature -25 ℃ to 70℃. Relative humidity 5% to 95% (no condensation)

Mechanical features: Compatible with S7-300 standard 35mm DIN rail installation, module width approximately 25mm (small volume design, saving control cabinet space), supports hot plugging (system configuration and power supply configuration support required)

Wiring method: Front connector wiring is adopted (Siemens 392-1AJ00-0AA0 front connector is recommended). Screw-type wiring design ensures reliable contact and is suitable for the wiring requirements of large current loads

Status indication: The module integrates a power indicator light (PWR) and a channel output status indicator light (each channel corresponds to an LED), providing real-time feedback on the working status and facilitating fault detection

Function

Direct drive for medium and high power loads: With a maximum output capacity of 2A per channel, no additional relays or amplification modules are required. It can directly drive 24V DC medium power loads such as contactor coils, medium-sized solenoid valves, small motors (such as DC micro motors), and high-power indicator lights, simplifying system wiring and integration

Group isolation and anti-interference: The photoelectric isolation structure in groups of 4 channels effectively blocks voltage surges and electromagnetic interference on the external load side, ensuring the stable operation of the S7-300 CPU and backplane bus, especially suitable for strong interference load scenarios such as motors and contactors

Stable output characteristics: Transistor (NPN) output architecture, with reduced on-voltage and strong switching stability, suitable for long-term and frequent start-stop load control. The channel overload capacity is superior to that of conventional modules, and the service life is longer

Seamless system integration: It communicates with the CPU in real time via the S7-300 backplane bus, supports STEP 7 software configuration, is compatible with industrial buses such as PROFIBUS-DP and PROFINET, and can be integrated into distributed control systems or single-machine automation systems, with flexible configuration

Convenient maintenance and fault diagnosis: Supports hot-swapping function, allowing faulty modules to be replaced during system operation to reduce downtime. The channel status indicator light visually displays the output status. Combined with the CPU diagnostic function, it can quickly locate faults such as overload and short circuit

Small volume and high power density: Designed with a width of only 25mm, it occupies a small space inside the control cabinet and is suitable for compact layout scenarios with a small number of loads but high power demands

Application scenarios

Power actuator control in general machinery: contactor coil drive for the spindle motor of machine tools, control of medium-sized solenoid valves (such as clamping cylinders, feed cylinder directional control valves) in hydraulic systems, and start and stop of tool drive motors (small DC motors) in cutting machines

Power load control for automated production lines: Start and stop of the drive motor (24V DC) for conveyor lines, drive of the solenoid valve (medium power) for the pushing mechanism of sorting equipment, and control of the contactor for the sealing motor of packaging machines

Auxiliary equipment control in the automotive manufacturing industry: solenoid valve drive for the press-fitting mechanism on the parts assembly line, coil control for the clamping contactor at the welding station, and high-power light source (24V DC) switch for the inspection equipment

Power control for warehousing and logistics systems: Start and stop of the walking motor (small DC motor) of the stacker crane in the stereoscopic warehouse, contactor control of the drive motor of the conveying roller conveyor, and drive of the brake solenoid valve of the lifting mechanism

Control of auxiliary power equipment for process industries: Start and stop of small dosing pumps (24V DC, medium power) in the chemical and pharmaceutical industries, control of actuators (DC 24V coils) for pipelines and valves, start and stop of small agitator motors

Building and infrastructure power control: Start and stop of high-power fans (24V DC) in building automation, drive of interlocking valve actuators in fire protection systems, and control of emergency lighting (high-power DC 24V) in industrial plants

Testing and experimental equipment: Load simulation device drive for industrial inspection equipment, medium-power actuator control for test benches (such as the clamping device of tensile testing machines), and high-power load switching for equipment aging tests

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