Safety/Standards - ABB IRB 4400 Manual

Description

2.2 Safety/Standards

The robot complies fully with the health and safety standards specified in the EEC's
Machinery Directives as well as ANSI/RIA 15.06-1992.
The robot is designed with absolute safety in mind. It has a dedicated safety system
based on a two-channel circuit which is monitored continuously. If any component
fails, the electrical power supplied to the motors shuts off and the brakes engage.
Safety category 3
Malfunction of a single component, such as a sticking relay, will be detected at the next
MOTOR OFF/MOTOR ON operation. MOTOR ON is then prevented and the faulty
section is indicated. This complies with category 3 of EN 954-1, Safety of machinery -
safety related parts of control systems - Part 1.
Selecting the operating mode
The robot can be operated either manually or automatically. In manual mode, the robot
can only be operated via the teach pendant, i.e. not by any external equipment.
Reduced speed
In manual mode, the speed is limited to a maximum of 250 mm/s (600 inches/min.).
The speed limitation applies not only to the TCP (Tool Centre point), but to all parts of
the robot. It is also possible to monitor the speed of equipment mounted on the robot.
Three position enabling device
The enabling device on the teach pendant must be used to move the robot when in man-
ual mode. The enabling device consists of a switch with three positions, meaning that
all robot movements stop when either the enabling device is pushed fully in, or when it
is released completely. This makes the robot safer to operate.
Safe manual movement
The robot is moved using a joystick instead of the operator having to look at the teach
pendant to find the right key.
Over-speed protection
The speed of the robot is monitored by two independent computers.
Emergency stop
There is one emergency stop push button on the controller and another on the teach
pendant. Additional emergency stop buttons can be connected to the robot's safety
chain circuit.
Safeguarded space stop
The robot has a number of electrical inputs which can be used to connect external safety
equipment, such as safety gates and light curtains. This allows the robot's safety
functions to be activated both by peripheral equipment and by the robot itself.
Delayed safeguarded space stop
A delayed stop gives a smooth stop. The robot stops in the same way as at a normal
program stop with no deviation from the programmed path. After approx. one second
the power supplied to the motors shuts off.
6 Product Specification IRB 4400 M98A/BaseWare OS 3.2