I/O modules

Overview

The HIMA F 7126A (F7126A) is a high-reliability power supply module designed for H51q safety systems. It converts 24 VDC input to 5 VDC output and ensures robust operation under industrial conditions. The module meets international safety and EMC standards, providing stable power for central and I/O modules.

Key Features

Voltage Specifications

• Input Voltage: 24 VDC
• Output Voltage: 5 VDC
• Supply Voltage Range: 24 VDC (-15% to +20%)
• Transient Voltage Tolerance: Short-term dips up to 20 ms

Safety Compliance

• Supports SELV (Safety Extra Low Voltage) or PELV (Protective Extra Low Voltage)
• Adheres to NAMUR NE 21 for voltage dip handling

Mechanical Design

• H41q Devices:
  • Subrack: 19-inch, 5 HU for central and I/O modules
  • Max. 13 I/O modules (width: 4 SU)
• H51q Devices:
  • Central Subrack: 19-inch, 5 HU
  • Max. 16 I/O subracks (4 HU each)
  • Max. 256 I/O modules (width: 4 SU)
• Modular unit dimensions: 1 SU = 5.08 mm, 1 HU = 44.45 mm

Power Distribution

• Decoupled central unit for voltage dip protection
• Parameterizable noise blanking

Connection and Wiring

• Front plate connections with LED indicators for I/O modules
• Fire-retardant wires/cables required
• RS485 and Ethernet interfaces for system programming and expansion

Ambient and Operating Conditions

• Operating Temperature: 0°C to +60°C (IEC 61131-2)
• Storage Temperature: -40°C to +85°C (without batteries)
• Pollution Degree: II (DIN VDE 0160)

System Specifications

Central Module

• Processor: Intel 386 EX (25 MHz)
• Memory: Flash-EPROM for OS, function blocks, and programs; CMOS-RAM with lithium battery backup
• Diagnostics: Built-in diagnostics with alphanumeric display and LEDs; error reporting for central device, I/O bus, and safety modules
• Cycle Times: 5 ms (single-channel), 27 ms (redundant systems)

Interfaces

• RS485: Max. 12 interfaces, 300 bps to 57,600 bps
• Ethernet: IEEE 802.3, 100BaseT, max. 10 interfaces for redundant H51q, 100 Mbit/s
• Profibus-DP: Max. 10 interfaces for redundant systems, up to 12 Mbit/s

Signal Definitions (IEC/EN 61131-2)

Input Signals

• L-Signal (0-Signal): -3 to +5 V or open input
• H-Signal (1-Signal): +13 to +33 V (typical switching point: ~9 V)

Output Signals

• L-Signal (0-Signal): 0 to +2 V
• H-Signal (1-Signal): +16 to +30 V

Applications

• Safety-critical industrial automation systems
• H51q central and I/O subrack power supply
• Systems requiring stable 5 VDC output from 24 VDC input

Details