Density Meter LB 444 SECTION 4. CONNECTIONS
38
Terminal for relay 1 (16a/16c)
The relay is used for error alarm signaling.
External product selection
Digital input 1 (18a/18c)
Digital input 2 (20a/20c)
Four different products can be defined.
External Start/Stop-Signal (22a/22c)
Option to interrupt the measurement for the following special applications:
- Start/Stop in batch mode
- Stop of continuous measurement
- Restart after measurement stop due to interfering radiation source.
0/4-20mA (26a+/26c-)
Isolated current output
Current input (28a-/28c+)
Depending on the application, either the product temperature (for temperature
compensation) or the volume flow (m³/h) can be entered as current signals 0/4 -
20 mA.
RS 232
Terminal for data transfer from evaluation units to a printer or PC (front panel of
evaluation unit).
Power Supply (28a/28c)
Power supply 115V/230V, depending on power supply unit (see label on instru-
ment rear panel!).
Fuses
To replace fuses, you have to open the turn-lock using a coin.
Note the fuse
type and power!
Before turning on the power supply, carefully check all connections once
more to prevent damage to the instruments.
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