RTU-325KZ configuration

01

Standard model

RTU-325KZ-E3-M4-B5-DI8-DO2-T

Specifications of one RTU

E3	3 Ethernet 10/100Base-TX; isolation 1.5 kV for 1 min.
M4	4 RS-232 ports without galvanic isolation.
B5	4 two-wire RS-485 ports plus 1 RS-485/422 with two- or four-wire wiring; isolation 2.5 kV for 1 min; surge protection.
DI8	8 DI; threshold ≥ 10 V; 13 mA at 24 V; optical isolation 3.75 kV for 1 min.
DO2	2 DO up to 28 V / 300 mA; optical isolation 3.75 kV for 1 min; reverse-polarity protection and resettable fuse.
T	−40…+70 °C.
USB	2 × USB 2.0.
DC	Two 12-30 V DC inputs with automatic switchover when backup power is available; up to 15 W per RTU.
NVM	Non-volatile memory ≥ 1 GB; data retention without external power ≥ 10 years.
MTBF	Service life ≥ 30 years; MTBF 240,000 h at +25 °C and 50% humidity.
IP30	Naturally cooled metal enclosure, IP30 without an external cabinet. Cabinet protection is defined by the project.
SIZE	100 × 142 × 178 mm; 208 mm high with mounting base; weight ≤ 1.5 kg.

Number of identical nodes

Equipment per node

Requirements apply to one node. Signals are duplicated in a redundant pair; channel counts do not add up.

02

Tasks and data volume

TelecontrolProcess data systemAutomated meteringCentral gateway functions

Digital devices

Required update interval

Required archive, days

Supervisory system

Additional tasks

One-minute load profilesPower quality and harmonicsEquipment diagnostics dataRemote configuration and diagnostics

Available protocols, client/server roles and device support are confirmed for the chosen software version. Profiles and harmonics depend on connected device capabilities.

03

Signals and external modules

8 DI and 2 DO are built in. Analogue signals use external modules. Do not count digital protocol points again as physical DI/AI channels.

Digital inputs DI

Digital outputs DO

Analogue inputs AI

Additional RS-232 beyond the 4 built-in ports

Additional RS-485/422 beyond the 5 built-in ports

Signal types and connected equipment

04

Protocols and infrastructure

Device-side protocols

Supervisory protocols

Primary external link

Backup link

Time synchronisation

Node power supply

Additional equipment and services

Backup power supplyCabinet and mounting accessoriesConfiguration and commissioningSecure communications design

Data volume, update interval, archive depth and device/protocol compatibility require technical review. External modules are selected separately and do not change the standard model code.