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76 HRB1684301-01
Chapter 8—Input / Output PowerLogic™ PM5500 series user manual
NOTE: Be aware that an unexpected change of state of the digital outputs may result
when the supply power to the meter is interrupted or after a meter firmware upgrade.
Digital output application example
You can connect one of your meter’s digital outputs to a relay that switches on a
generator and the other digital output to send a demand sync pulse to other meters. In
the following example, the first meter (Meter 1) controls and sets the demand period
(900 seconds) of the other meters (Meter 2, Meter 3, Meter 4) through the output pulse
occurring at the end of the first meter’s demand interval.
Related topics
• See “Specifications” on page 28 for electrical characteristics and limits for the digital
outputs.
• See “Demand setup” on page 40 for details on configuring demand parameters.
• See “Power demand calculation methods” on page 115 for descriptions of the
different demand calculation methods.
Digital output setup
The digital output ports (D1 and D2) can be configured using the front panel or
ION Setup.
NOTE: It is recommended you use ION Setup to configure the digital outputs, as setup
parameters that require text entry can only be modified using software.
DANGER
HAZARD OF ELECTRIC SHOCK, EXPLOSION, OR ARC FLASH
• Apply appropriate personal protective equipment (PPE) and follow safe electrical
work practices. See NFPA 70E in the USA or applicable local standards.
• Turn off all power supplying this device before working on it.
• Always use a properly rated voltage sensing device to confirm that all power is off.
• Do not exceed the device’s ratings for maximum limits.
• Do not use this device for critical control or protection applications where human or
equipment safety relies on the operation of the control circuit.
Failure to follow these instructions will result in death or serious injury.
Digital output wiring example
+
-
<30VAC
<60VDC
D1 D2
+
-
+
-
900 s
+
-
<30VAC
<60VDC
D1 D2
+
-
+
-
900 s
Meter 1 digital outputs
Meter 2 Meter 3 Meter 4
125 mA