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26 HRB1684301-01
Chapter 2—Hardware reference PowerLogic™ PM5500 series user manual
Related topics
• See “Digital output applications” on page 77 for digital output use and configuration
details.
Digital inputs
The meter is equipped with four digital input ports (S1 to S4). You can configure the
digital inputs for use in status monitoring or input metering applications.
The meter’s digital inputs require an external voltage source to detect the digital input’s
on/off state. The meter detects an on state if the external voltage appearing at the
digital input is within its operating range.
The digital inputs require a 18 - 30 V AC or 12 - 30 V DC external voltage source to
detect the digital input’s on/off state.
Related topics
• See “Digital input applications” on page 71 for digital input use and configuration
details.
Digital output connections
+
-
LOAD
LOAD
<30VAC
<60VDC
D1 D2
D1 D2
+
-
+
-
≤ 125 mA
Digital input connections
S1 S2 S3 S4
++++
----
+
-
18-30VAC
12-60VDC
+
-
18-30VAC
12-60VDC
+
-
+
-
18-30VAC
12-60VDC
18-30VAC
12-60VDC