ABBAC 800M Controller Hardware

Safety Summary (continued)

• Process technicians are to be present when testing and operating process 

objects.

• Never activate any System Initialization push-button if any uncertainty 

exists regarding exactly what occurs within the system during initialization. 

ALWAYS CHECK FIRST.

• Remember at all times, that the control system can be controlled from a 

remote engineering station, connected at another node via Control 

Network.

• Remember, the AC 800M Controller will start automatically when voltage 

is applied.

Taking steps to bring the process to a safe state, provides an improved level of 

safety when power supplies, communication links or parts of the control system 

fail. Such steps may require, for example, the installation of valves or relays that 

automatically return to a fail-safe position.

Product Safety

The following safety rules must be observed at all times:

• To avoid discharging static electricity, ground both yourself and any tools 

before handling printed circuit boards, batteries, memory cards, and other 

sensitive pieces of the equipment

• All electronic devices are sensitive to ESD (electrostatic discharge). To 

avoid accidental damage while handling printed circuit boards, it is 

recommended to wear a wrist strap, grounded to the chassis. The strap must 

have a built-in protective resistor

• Anti-static, conductive plastic bags must be used for storage and transport 

of PC boards in transit.

Safety Summary

Before replacing Units

Maintenance

All procedures for replacing units can be located by referring to the relevant 

documentation.

Removing or replacing units with system power connected can cause injury to 

personnel and damage to equipment. It is, therefore, of the utmost importance 

that the power supply be fully disconnected, on the process side, before removal 

or insertion of units takes place. 

See Online Replacement of Unit on page 198 and I/O documentation.

It is recommended that a stock of suitable spare components be maintained to 

avoid system downtime.

Ensure that back-up copies of the current application program are made at 

regular, predetermined intervals to avoid system downtime.

Safety Summary (continued)

Operating Environment

Before the AC 800M Controller system is brought online, investigate which 

environmental conditions are applicable. Take note in particular of the 

following:

• The controller must not be exposed to conditions that exceed the values given 

in the relevant technical specifications.

• The controller must not be used in an environment exposed to strong electrical 

interference. Electrical machines can produce interference that exceeds levels 

permitted for the equipment, for example during repair work.

• All products must be handled with appropriate precautions with regard to 

electrostatic damage.

• The controller must not be exposed to direct sunlight.

Important Software Check

• Use the system’s fault-monitoring facilities to prevent accidents or mishaps.

• When in doubt, ALWAYS CHECK before executing changes.

Important Hardware Notice

• DO NOT, under any circumstances, disconnect the power supply to a 

normally functioning system. Always use the correct system shut-down 

procedure prior to disconnecting the power supply.

Signal Noise Due to Cables

Cables which may cause electrical interference (for example, power supply cables) 

must not be installed adjacent to bus cables carrying fast digital signals. Ensure that 

a minimum distance of 10 cm (4 in.) is provided between cables installed inside 

cabinets.

Hazardous Electrical Supplies

Operational and maintenance procedures, during which personnel may come into 

contact with high voltage, should only be carried out by personnel fully trained in 

the maintenance of electrical equipment within those environments, and who are 

fully aware of all risks involved.

Safety Summary

Electrostatic Sensitive Device

Devices labeled with this symbol require special handling precautions as 

described in the installation section.

GENERAL

 WARNINGS

Equipment Environment

All components, whether in transportation, operation or storage, must be 

in a noncorrosive environment.

Electrical Shock Hazard During Maintenance

Disconnect power or take precautions to insure that contact with energized parts is avoided when servicing.

SPECIFIC

WARNINGS

Page 67: The AC 800M Controller and associated units must be unpowered and disconnected when being mounted onto a DIN-rail!

Page 68: It is not allowed to manipulate CEX bus baseplates in a powered 

and running system. Before changing or removing a baseplate, all CEX 

modules on that segment must be removed.

Page 72: AC 800M units must be disconnected from the power source 

before removing them from a DIN-rail!

Page 72: It is not allowed to manipulate CEX bus baseplates in a powered 

and running system. Before changing or removing a baseplate, all CEX 

modules on that segment must be removed.

Page 78: For PM861/PM864/PM865/PM866 insert the RCU Link Termination plug TB852, at the RCU Link connector. The termination plug must