Stein Sohn E 083.1 PLC Rack Module

The Stein Sohn E 083.1 is a PLC rack (chassis) module designed for use with Stein Sohn automation systems. Part number 0010026-054100A identifies this specific backplane unit that holds and interconnects the CPU, power supply, and I/O modules in a modular controller. Stein Sohn controls are often found in specialized industrial machinery (e.g., printing presses, converting equipment) and legacy automation systems. The E 083.1 provides a robust, industrially hardened platform for distributed control.

Technical Specifications

The E 083.1 rack features a passive backplane with 8 slots for Eurocard‑format modules (160 mm x 100 mm). The backplane provides a parallel data bus (16‑bit) and separate power rails for 5 V DC (logic) and 24 V DC (field I/O). The rack dimensions: 260 mm (W) x 160 mm (H) x 220 mm (D). It is made of sheet steel with a protective coating. Power is supplied via a terminal block (screw type) accepting 24 V DC (18‑30 V) and optionally 5 V DC from an external supply. The rack includes a green LED for power indication and a DIN rail mounting bracket (35 mm) for installation inside a control cabinet. Operating temperature 0‑55°C, humidity 10‑90% non‑condensing. The backplane connectors are DIN 41612 type C (96 pins) for each slot.

Key Features

• 8 slots for Stein Sohn CPU and I/O modules

• Passive backplane with bus arbitration

• Supports 5 V and 24 V power distribution

• DIN rail mountable

• Robust steel construction for industrial environments

• Clear labeling of slot numbers

• Fanless design (passive cooling)

Compatible Modules

The E 083.1 rack is designed to accept Stein Sohn series modules, such as the E 081 CPU, E 082 digital I/O, E 084 analog I/O, and E 086 communication cards. It may also accept third‑party Eurocard modules if they adhere to the same pinout and bus timing (though this is not guaranteed). The rack does not have a built‑in power supply; an external power supply module (e.g., Stein Sohn E 085) must be used or power must be fed directly to the backplane terminals.

Backplane Bus Architecture

The backplane bus includes 16 address lines, 16 data lines, and control signals (I/O read/write, interrupt, DMA request, etc.). The bus is a proprietary Stein Sohn design derived from the STD bus or similar. The CPU module acts as bus master. I/O modules are mapped into memory addresses. The bus requires proper termination on the last module; if the rack is partially populated, termination may be needed on the last slot. The backplane also distributes a battery backup line for CPU RAM retention.

Installation and Wiring

Mount the rack on a 35 mm DIN rail using the integral clips. Ensure sufficient clearance for module extraction (at least 100 mm in front). Connect the power supply (24 V DC) to the terminals marked +24V and GND (use 2.5 mm² wire). If the CPU requires 5 V, connect an external 5 V supply to the 5V and 5VGND terminals (or use a dedicated power module). Insert modules one by one, aligning them with the card guides, then press firmly until the DIN connector seats. Secure each module with two screws (provided on each module) to the rack’s front rail.

Applications

The E 083.1 rack is used in Stein Sohn based control systems for:

• Printing press controls (registration, tension)

• Converting machinery (slitter‑rewinders, laminators)

• Special purpose automation (packaging, textile)

It is primarily encountered in maintenance and upgrade projects for legacy equipment.

Diagnostics and Maintenance

The only indicator is the power LED (green). If the LED is off, check the external supply voltage and the internal fuse (if present – a resettable PTC may be on the backplane). To troubleshoot, remove all modules and test the backplane continuity. Replace the rack if a slot is damaged (individual slot repair is not recommended). Clean the rack with compressed air periodically.

Standards and Compliance

The Stein Sohn E 083.1 is CE marked and designed for industrial environments according to EN 61131‑2. It is RoHS compliant. It is not rated for hazardous locations (non‑explosion proof).

Conclusion

The Stein Sohn E 083.1 PLC rack module provides a durable and straightforward backplane for Stein Sohn automation components. Its modular design allows flexible system configuration, making it suitable for legacy industrial control applications.