Customer Connections Outputs - EASTERN INSTRUMENTS CENTRIFEEDER ELECTRONICS Manual

24V Local Power Output
For your convenience a 24 Volt Local Power Output has been provided that can be used to
power the various outputs as listed above. Install a Jumper Wire from the positive terminal of
the Local Power Output to the positive terminal of the desired output and a Jumper Wire from
the negative terminal of the Local Power Output to the negative terminal of the desired out‐
puts to provide power to the output.
Note: Use of local power will result in a loss of isolation.
4‐20 mA Output
Analog Output (Sourced)
Loop Power NOT Required
Maximum Load Resistance = 900 ohms
NOT AVAILABLE FOR CENTRIFEEDER VIB
The CentriFlow® Meter Electronics is capable of outputting an analog signal. This signal is a 4‐
20 mA instantaneous isolated signal. The signal output is proportional to the Electronic Full
Scale Flow Rate. For example, if the Electronic Full Scale Flow Rate were calibrated to be 300
lb/min, then an output of 12 mA would correspond to a Flow Rate of (12‐4)/(20‐4) x 300 = 150
lb./min or 50% of the Electronic Full Scale Flow Rate. Since this output is directly related to
the Electronic Full Scale Flow Rate any change in Calibration to change the Electronic Full Scale
Flow Rate would result in a change in the signal so as to retain the proportionality. Thus, if the
Electronic Full Scale Flow Rate were changed from 300 lb./min to 500 lb./min, then a 20 mA
output would correspond to the 500 lb/min flow rate. Connection to this output signal will be
made according to the CUSTOMER CONNECTIONS diagram below. It is recommended that the
wires for this signal be routed through the conduit housing the power connection. It is recom‐
mended that this analog output be used for Control purposes and not for Trending unless a
signal filter is used. Please see the filtering section of this manual for more details on filtering.
Alarm Output
Relay Output
The relay can be used to trigger alarms which warn the operator that a batch is complete or
that the flow rate has exceeded a threshold. The output is programmable to be assigned for
rate or count. When assigned to the count, the relay can have a user selectable on time
(duration) or can be latched until reset.
416 Landmark Drive
Wilmington, NC 28412
Customer Connections Outputs
www.easterninstruments.com
14
Phone:(910) 392‐2490
Fax: (910) 392‐2123