The new Allen-Bradley 193-E3 Plus DeviceNet-capable motor protection
relay from Rockwell Automation has DeviceLogix built in, allowing
seamless transition to local control in the event of network failure.
Device addressing is accomplished manually via rotary DIP switches, while
an 'Unconnected Message Manager' enables the relay to maintain
simultaneous conversations with other devices on the DeviceNet network.
E3 range motor protection relays provide thermal overload, phase loss,
stall, jam, under-load, thermistor and current imbalance protection, and
have integral earth fault sensing as standard. The 193-E3 Plus can also
be programmed with a second load current setting, allowing better fault
management in two-speed applications. The fault conditions are fully
programmable and include pre-trip warnings to give the operator a chance
to check out a possible fault before the motor goes off-line.