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E7 200Smart CPU Standard Edition，CPU SR40 Relay，24DI/16DO,1*RJ45，2*RS485, Expandable to 6IO

Overview

• Model Number: E7 288-1SR40-0AA1
• Description: Standard CPU SR40, Relay type
• Dimensions: 125 × 100 × 81 mm
• Power Consumption: 23W
• Available Current: 
  • SM Bus: Max. 1400mA
  • 24V DC: Max. 300mA

Memory

• Program Memory: 24 KB
• Data Memory: 16 KB
• Retentive Memory: 10 KB (permanent data preservation)

I/O Capabilities

• Digital Inputs: 24 (sinking/sourcing type, IEC Type 1 sinking)
• Digital Outputs: 16 (Relay, dry contact)
• Analog Inputs/Outputs: 
  • Process Image: 256-bit input (I), 256-bit output (Q)
  • Analog Image: 56 words input (AI), 56 words output (AQ)
• High-Speed Counters: 6 total 
  • Single-phase: 4 at 200kHz, 2 at 30kHz
  • Quadrature phase: 2 at 100kHz, 2 at 20kHz
• Pulse Output: None
• Timers: 
  • Non-holding: 192
  • Holding: 64
• Counters: 256
• Bit Memory: 256 bits
• Cycle Interrupts: 2, with 1ms resolution (T32, T96)
• Interrupt Edges: 4 rising, 4 falling

Communications

• Ethernet: 
  • 1 port, supporting 10/100 Mbps
  • 8 active clients, 8 active servers (PUT/GET protocol)
  • 8 active, 8 passive connections (open-type communication)
• Serial Ports: 
  • 2 x DB9-RS485
  • 1 x CM01-RS485-RS232
• Transmission Rates: 
  • Ethernet: 10/100 Mbps
  • RS485: 9600, 19200, 187500 bps, 1200-115200 bps
• Isolation: 
  • Ethernet: Transformer isolation (1500VDC)
  • RS485: None

Power Supply

• Input Voltage: 85-264V DC
• Input Current: 
  • CPU only (120V AC): 130mA (without 300mA sensor power supply) / 250mA (with 300mA sensor power supply)
  • CPU only (240V AC): 80mA (without 300mA sensor power supply) / 150mA (with 300mA sensor power supply)
  • Includes CPU + expansions: 
    • 130mA at 120V AC
    • 190mA at 240V AC
• Inrush Current (Max): 16.3A at 264V DC
• Sensor Voltage: 20.4V to 28.8V DC
• Isolation: 
  • Input to Logic: 1500V AC for 1 minute
  • Sensor to Logic: Not isolated

Digital Input

• Number of Inputs: 24
• Input Type: Sinking/Sourcing (IEC Type 1 sinking)
• Allowable Continuous Voltage: Max. 30VDC
• Surge Voltage (Max): 35V DC (0.5s duration)
• Logic 1 Signal: 15V DC at 2.5mA minimum
• Logic 0 Signal: 5V DC at 1mA maximum
• Optical Isolation: 500V AC for 1 minute

Digital Output

• Number of Outputs: 16
• Output Type: Relay (dry contact)
• Voltage Range: 5-30V DC or 5-250V AC
• Surge Current (Max): 7A (when power is first applied)
• Rated Current per Output Point: 2.0A
• Switching Frequency: Not recommended
• Turn-on/Turn-off Delay: 
  • Qa.0 to Qa.3: Up to 10ms
  • Qa.4 to Qb.7: Up to 10ms
• Optical Isolation: 500V AC for 1 minute
• Contact Lifetime: 
  • Non-loaded: 10,000,000 cycles
  • Rated Load: 10,000 cycles

Miscellaneous

• Real-Time Clock: Typically 7 days, at least 6 days at 25°C
• Memory Card Support: Yes
• Signal Expansion Board Support: Yes

Summary

The CPU SR40 AC/DC/RLY is an industrial PLC with relay-based digital outputs. It is ideal for control systems that need both AC/DC input power options and relay outputs, supporting a variety of industrial applications. It features a relatively high memory capacity (24 KB program memory, 16 KB data memory), and supports flexible I/O configurations with up to 6 expansion modules. The built-in communications (Ethernet, RS485) and high-speed counters make it suitable for applications requiring real-time processing and network connectivity.

This model is well-suited for environments that require relay-based outputs for controlling machinery or other devices, and its flexibility in power input (AC/DC) makes it adaptable to different system configurations.