A network-connected rack PDU held at the left of the frame, its data and serial ports picked out by one raking light while the right of the frame stays in clean shadow

Monitoring · protocol integration

SNMP and Modbus integration

The monitoring board on an IDCPDU rack PDU carries 10/100M Ethernet and RS485, and answers on SNMP and Modbus from the same meter data. Remote switching is addressed per outlet or per group over the same interface.

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Ethernet: 10/100M × 1
Serial: RS485 × 1
Protocols: SNMP · Modbus
Values: per feed · per outlet
Event store: up to 20,000 entries

What a poller reads

Two columns, one row per item: what the platform asks for, and what comes back from the rack. Every value sits on the published scale for the series.

Transport: 10/100M Ethernet × 1
Serial line: RS485 × 1
Protocol A: SNMP
Protocol B: Modbus
Values polled: total per feed · per outlet
Voltage scale: 1V over 90V ~ 350V
Current scale: 0.1A
Metering accuracy: ±1% + 1 digit
Power accuracy: ±1% per feed
Energy total: 1 grade · 0.1 kWh
Trap source: threshold crossing on a line
Mail path: SMTP through the same board
Local fallback: OLED at the rack
Event store: up to 20,000 entries · RTC hold
Remote switching: per outlet or per group
Ambient sensor: -30°C ~ 100°C · humidity 1% ~ 99%

Integration

What the platform side needs

PollerSNMP or Modbus
TrapsThreshold crossings
Log readEthernet or RS485
Host softwareNone

From requirement to mechanism

A rack that is already polled should not need a second stack

A hall that already polls its racks should not need a gateway for one more unit. The board answers on the ports it already carries, publishes the same meter data the local display shows, and raises its own trap when a threshold is crossed, so the platform reads this rack the way it reads the rest of the row.

Register read: meter values
Trap: threshold crossing
Protocols: SNMP · Modbus
Ports: Ethernet × 1 · RS485 × 1

Where a project already runs a register map, the per-line sheet from the quotation is the document that map is written against.

The port face of a rack PDU in a dark aisle, network and serial connectors lit from the upper left with the cable run and the rack rails falling out of focus — Ethernet × 1 · RS485 × 1 · SNMP · Modbus

Meter row

One row per value a poller reads

Each row is a value on the reporting line: the item, the scale it reports at, what it means, and the surfaces that carry it.

Voltage 1V Line and phase readings on three-phase builds, inside a 90V to 350V window SNMP · Modbus · OLED

Total current 0.1A Summed per feed at ±1% plus one digit SNMP · Modbus · OLED

Outlet current 0.1A Per outlet on switched builds, read on the same poll SNMP · Modbus

Active power ±1% Per feed, at the same accuracy as the current reading SNMP · Modbus · OLED

Energy 0.1kWh Billing-grade total kept at 1 grade SNMP · Modbus · OLED

Ambient temperature 1°C Optional sensor over -30°C to 100°C, for the inlet or the rack front SNMP · SMTP

Humidity 1% Optional sensor covering 1% to 99%, reported beside temperature SNMP · SMTP

Main switch state On/off Read as a contact state beside the meter values SNMP · Modbus · OLED

A register read returns the meter value at the scale it was measured on. Every figure on this page is published for the series.

From poll to record

How a reading becomes a record

Three stages, in order. The platform drives the first and the third; the board acts on its own in the middle one.

Register read

The platform reads the meter values on its own cycle over SNMP or Modbus, without a write into the unit.

Output: current, voltage, power and energy per feed · buyer supplies the poll cycle

Trap on crossing

When a value crosses the threshold set for that line, the board sends the trap and writes the entry with the time from the RTC.

Output: trap and dated log entry · thresholds set per line

Log retrieved

The dated entries are read back over the same interface, up to 20,000 of them, with the clock held through a power loss.

Output: dated record for the window · buyer supplies the window

A macro of the connector field on a rack PDU at the left of the frame, one cable seated among the IEC outlet bodies with the brushed steel between the ranks catching a raking light — Port face · Ethernet · RS485 · per-outlet switching

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Send the protocol stack and the rack lines

Outlet combination, current per feed, metering depth and remote switching. The reply names the protocol the rack answers on and carries a per-line specification sheet, in English.

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Reply within 12 hours on working days. No lead time and no minimum quantity figure is published on this site.