PT-7528 Series

Features and Benefits

  • IEC 61850-3, IEEE 1613 (power substations) compliant
  • Built-in MMS server based on IEC 61850-90-4 switch data modeling for power SCADA
  • Noise Guard™ wire speed zero packet loss technology
  • Turbo Ring and Turbo Chain (recovery time < 20 ms @ 250 switches), RSTP/STP, and MSTP for network redundancy
  • Isolated redundant power inputs with universal 24 VDC, 48 VDC, or 110/220 VDC/VAC power supply range
  • -40 to 85°C operating temperature range


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The PT-7528 Series is designed for power substation automation applications that operate in extremely harsh environments. The PT-7528 Series supports Moxa’s Noise Guard technology, is compliant with IEC 61850-3, and its EMC immunity exceeds IEEE 1613 Class 2 standards to ensure zero packet loss while transmitting at wire speed. The PT-7528 Series also features critical packet prioritization (GOOSE and SMVs), a built-in MMS server, and a configuration wizard designed specifically for substation automation.

With Gigabit Ethernet, redundant ring, and 110/220 VDC/VAC isolated redundant power supplies, the PT-7528 Series further increases the reliability of your communications and saves cabling/wiring costs. The wide range of PT-7528 models available support multiple types of port configuration, with up to 28 copper or 24 fiber ports, and up to 4 Gigabit ports. Taken together, these features allow greater flexibility, making the PT-7528 Series suitable for a variety of industrial applications.

Additional Features and Benefits

  • Switch data modeling based on the IEC 61850-90-4 standard

  • Fiber Check™ provides monitoring and diagnosis functions on MST/MSC/SSC/SFP fiber ports

  • VLAN Unaware: Supports priority-tagged frames to be received by specific IEDs

  • EtherNet/IP and Modbus TCP industrial Ethernet protocols supported

  • Configurable by web browser, Telnet/Serial console, CLI, Windows utility, and ABC-02 automatic backup configurator

  • Turbo Ring and Turbo Chain (recovery time < 20 ms @ 250 switches),  RSTP/STP, and MSTP for network redundancy

  • DHCP Option 82 for IP address assignment with different policies

  • IGMP snooping and GMRP for filtering multicast traffic from industrial Ethernet protocols

  • IEEE 802.3ad, LACP for optimum bandwidth utilization

  • Bandwidth management to prevent unpredictable network status

  • Multiport mirroring for online debugging

  • Automatic warning by exception through email and relay output

  • RMON for proactive and efficient network monitoring

  • Automatic recovery of connected device’s IP addresses

  • Line-swap fast recovery

  • Noise Guard™ provides a high level of EMC immunity for critical applications, exceeding IEEE 1613 Class 2

Cybersecurity Features

  • User passwords with multiple levels of security protect against unauthorized configuration

  • SSH/HTTPS is used to encrypt passwords and data

  • Lock switch ports with 802.1X port-based network access control so that only authorized clients can access the port

  • RADIUS/TACACS+ allows you to manage passwords from a central location

  • 802.1Q VLAN allows you to logically partition traffic transmitted between selected switch ports

  • Secure switch ports so that only specific devices and/or MAC addresses can access the ports

  • Disable one or more ports to block network traffic

  • SNMPv3 provides encrypted authentication and access security


Ethernet Interface
10/100BaseT(X) Ports (RJ45 connector) PT-7528-4TX Series: 4
PT-7528-8TX Series: 8
PT-7528-12TX Series: 12
PT-7528-16TX Series: 16
PT-7528-24TX Series: 24
1000BaseSFP Slots PT-7528-4GSFP Series: 4
100BaseFX Ports (multi-mode SC connector) PT-7528-8MSC Series: 8
PT-7528-12MSC Series: 12
PT-7528-16MSC Series: 16
PT-7528-20MSC Series: 20
100BaseFX Ports (multi-mode ST connector) PT-7528-8MST Series: 8
PT-7528-12MST Series: 12
PT-7528-16MST Series: 16
PT-7528-20MST Series: 20
100BaseFX Ports (single-mode SC connector) PT-7528-8SSC Series: 8
Optical Fiber
Cabling Direction Front cabling
Compatible Modules PT-7528-24TX Series:
Slot 1: PM-7500-2GTXSP, PM-7500-4GTXSFP, PM-7500-2MSC/4MSC, PM-7500-2MST/4MST, PM-7500-2SSC/4SSC
Standards IEEE 802.1D-2004 for Spanning Tree Protocol
IEEE 802.1p for Class of Service
IEEE 802.1Q for VLAN Tagging
IEEE 802.1s for Multiple Spanning Tree Protocol
IEEE 802.1w for Rapid Spanning Tree Protocol
IEEE 802.1X for authentication
IEEE 802.3 for 10BaseT
IEEE 802.3ab for 1000BaseT(X)
IEEE 802.3ad for Port Trunk with LACP
IEEE 802.3u for 100BaseT(X) and 100BaseFX
IEEE 802.3x for flow control
IEEE 802.3z for 1000BaseSX/LX/LHX/ZX
Ethernet Software Features
Filter 802.1Q, GMRP, GVRP, IGMP v1/v2c, Port-based VLAN, VLAN unaware
Industrial Protocols EtherNet/IP, Modbus TCP
Management Back Pressure Flow Control, BOOTP, DHCP Option 66/67/82, DHCP Server/Client, Flow control, HTTP, IPv4/IPv6, LLDP, Port Mirror, RARP, RMON, SMTP, SNMP Inform, SNMPv1/v2c/v3, Syslog, Telnet, TFTP, Fiber check
MIB Bridge MIB, Ethernet-like MIB, MIB-II, P-BRIDGE MIB, Q-BRIDGE MIB, RMON MIB Groups 1, 2, 3, 9, RSTP MIB
Power Substation IEC 61850 QoS, MMS, Configuration Wizard
Redundancy Protocols Link Aggregation, MSTP, RSTP, STP, Turbo Chain, Turbo Ring v1/v2
Security Broadcast storm protection, HTTPS/SSL, TACACS+, Port Lock, RADIUS, Rate Limit, SSH
Time Management NTP Server/Client, SNTP
Switch Properties
IGMP Groups 256
Jumbo Frame Size 9.6 KB
Max. No. of VLANs 256
VLAN ID Range VID 1 to 4094
Priority Queues
Switching Capacity 12.8 Gbps
Forwarding Capacity 12.8 Gbps
USB Interface
Storage Port USB Type A
Serial Interface
Console Port USB-serial console (Type B connector)
Input/Output Interface
Alarm Contact Channels Resistive load: 3 A @ 30 VDC, 240 VAC
Power Parameters
Connection 10-pin terminal block
Input Voltage PT-7528-HV-HV/WV-WV/WV-HV Series: Redundant power modules
PT-7528-WV Series: 24/48 VDC (18 to 72 VDC)
PT-7528-HV Series: 110/220 VAC/VDC (85 to 264 VAC, 88 to 300 VDC)
Input Current For models with fewer than 8 fiber ports:
PT-7528-WV Series: 0.741 A @ 24 VDC, 0.364 A @ 48 VDC
PT-7528-HV Series: 0.147/0.077 A @ 110/220 VDC, 0.283/0.190 A @ 110/220 VAC
For models with 8 or more fiber ports:
PT-7528-WV Series: 1.428 A @ 24 VDC, 0.735 A @ 48 VDC
PT-7528-HV Series: 0.586/0.382 A @ 110/220 VAC, 0.313/0.167 A @ 110/220 VDC
Overload Current Protection Supported
Reverse Polarity Protection Supported
Physical Characteristics
Housing Aluminum
IP Rating IP40
Dimensions (without ears) 440 x 44 x 325 mm (17.32 x 1.73 x 12.80 in)
Weight 4900 g (10.89 lb)
Installation 19-inch rack mounting
Environmental Limits
Operating Temperature -40 to 85°C (-40 to 185°F)
Note: Cold start requires minimum of 100 VAC @ -40°C
Storage Temperature (package included) -40 to 85°C (-40 to 185°F)
Ambient Relative Humidity 5 to 95% (non-condensing)
Standards and Certifications
Safety UL 508
EMI EN 55032 Class A, CISPR 32, FCC Part 15B Class A
EMS IEC 61000-4-2 ESD: Contact: 8 kV; Air: 15 kV
IEC 61000-4-3 RS: 80 MHz to 1 GHz: 35 V/m
IEC 61000-4-4 EFT: Power: 4 kV; Signal: 4 kV
IEC 61000-4-5 Surge: Power: 4 kV; Signal: 4 kV
IEC 61000-4-6 CS: 10 V
IEC 61000-4-8 PFMF
IEC 61000-4-11 DIPs
Power Substation IEC 61850-3, IEEE 1613 Class 2, Note: Models with MCS and SSC fiber ports are compliant with IEEE 1613 Class 1
Railway EN 50121-4
Traffic Control NEMA TS2
Time 771,320 hrs
Standards Telcordia SR332
Warranty Period 5 years
Details See