Create Online-3000-RT.yaml (#3464)

* Create Online-3000-RT.yaml

* Update Online-3000-RT.yaml

device-types/Powerman/Online-3000-RT.yaml

@@ -0,0 +1,50 @@
+---
+manufacturer: Powerman
+model: Online-3000-RT
+slug: powerman-online-3000-rt
+u_height: 2.0
+is_full_depth: true
+airflow: front-to-rear
+comments: '[3000VA/2700W Online 2U Managed UPS Quickspecs](https://powerman.ru/online-3000-rt/)'
+weight: 28.5
+weight_unit: kg
+console-ports:
+  - name: Serial
+    type: de-9
+  - name: USB
+    type: usb-b
+power-ports:
+  - name: Input
+    type: iec-60320-c20
+    maximum_draw: 3600
+power-outlets:
+  - name: Segment1_1
+    type: iec-60320-c13
+    power_port: Input
+  - name: Segment1_2
+    type: iec-60320-c13
+    power_port: Input
+  - name: Segment1_3
+    type: iec-60320-c13
+    power_port: Input
+  - name: Segment1_4
+    type: iec-60320-c13
+    power_port: Input
+  - name: Segment2_1
+    type: iec-60320-c13
+    power_port: Input
+  - name: Segment2_2
+    type: iec-60320-c13
+    power_port: Input
+  - name: Segment2_3
+    type: iec-60320-c13
+    power_port: Input
+  - name: Segment2_4
+    type: iec-60320-c13
+    power_port: Input
+  - name: High
+    type: iec-60320-c19
+    power_port: Input
+module-bays:
+  - name: IntelligentSlot
+    position: Rear