Pulse output connections
CAUTION: The pulse output contacts are rated at 100mA AC/DC, 100V max. Under no
circumstances should this rating be exceeded.
The AEM33P is fitted with a single pulse output proportional to kWh. The output has a telltale LED
on the front panel which flashes ‘on’ to indicate that a pulse has been counted.
The pulse connections are: Terminals 13 & 14
The contacts are volt free and therefore an external power supply must be provided.
RS485 connections
The RS485 output consists of 3 pairs of terminals located at the bottom left of the rear panel of the
instrument. These should be connected via the correct specification cable to the data bus. (Refer to
Elcomponent for cable recommendations.)
Terminal connections are as follows: 19 & 20 = A 21 & 22 = B 23 & 24 – 0V
NOTE: It is essential that polarity is respected when other units are connected to the bus.
Instrument operation
When the instrument is powered up, the display will initially show the internal software version,
then after a few seconds will start displaying measured values. The four buttons allow the user to
scroll through the available measurements.
ENERGY DISPLAYS
Press to select kWh, kVArh, KVAh and Hours Run pages.
The Hours Run register accumulates the total time during
which the average 3 phase load current exceeds a preset
level. This is always displayed with a resolution 0.1 hour.
The percentage level of (l1+l2+l3) at which the Hours Run
register accumulates is user programmable from 1% to
100% of full scale current.
Press and together and hold for 2 seconds to reset the hours run register.
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