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Chapter 14
Event Input Voltage Settings
14.1
General Information
This section describes two configurations of the 1133A Event Inputs, and the installation of resistors
to change the Event Input voltage range from 24–240 Vdc to 5 Vdc CMOS level.
14.2
Event Input Specifications
For your convenience, the Event Input specifications are repeated below in Table 14.1.
Part
Specification
Type & Number
Four, optically-isolated 24-240 Vdc (may be configured
for 5-Vdc logic level)
Connections
Pluggable, 8-pole, 5-mm terminal strip, with 4, 2-pole
mating connectors
Isolation
4000 Vrms for 1 minute to chassis
Resolution
1
µ
s
Table 14.1: Event Input Specifications
14.3
Standard Event Input Voltage, 24 – 240 Vdc
All of the four event inputs on the 1133A Power Quality / Revenue Standard are configured for an
input voltage range of 24-240 Vdc. For the standard setting NONE of the four optional resistors
need to be installed, i.e. R225, R226, R227, R228 (See Figure 14.1).
14.4
Optional Event Input Voltage, 5 Vdc, Logic Level
To set up the Event Inputs for a 5 Vdc, follow the instructions below.
WARNING!
Do not remove the top cover while power is applied. Hazardous voltages are present
while the power cord is connected. Always disconnect the unit from the input power source before
removal of the top cover.