The LOGOLINE 500 family of pen recorders with text printing comprises three pen recorders: Type LL.v-44u, Type LL.v-44uj and Type LL.v-44ud.
Supplied by Practical Control Solutions , each of the pen recorders offer up to three measurement inputs for recording the measurements, which are isolated from each other by optocouplers.
Measurements can be read by pointers against scales, or are shown on the display. Channel 1 can be used to output text in addition to the measurement trace.
The watchdog monitors the pen recorder function and triggers a restart in the event of a fault. On a power failure, the real-time clock in the pen recorders is buffered by the recorders.
In most cases, a math and logic module enables recorders to be individually adapted to complex measurement tasks. An external relay module ER8 for rail mounting supplements pen recorders by eight switching outputs. A 2-wire transmitter can be operated from an isolated supply.