MTL 9470-ET/G Gigabit intrinsically safe ethernet range

The Crouse-Hinds series MTL 9470-ET/G product range provides cost-effective Intrinsically Safe (IS) gigabit Ethernet equipment that can be installed and maintained easily in hazardous areas. The intrinsically safe hazardous area certification, along with the associated apparatus certification of the 9478-ET/G IS Ethernet isolator and 9492-PS-PLUS power supply, permits the components to be mounted in a Zone 2 hazardous area with connectivity into Zone 0.

In process automation it is also preferable to use a single cable to provide both power and communications to the end device. The MTL 9470 range can deliver Intrinsically Safe Power over Ethernet (PoEx™) with a single Cat 5e or Cat 6 cable, allowing live connection and disconnection of the end device in Zone 0 and 1 hazardous areas.

Additionally, the Gigabit range is suitable for bandwidth intensive applications.

Download specs – MTL 9471-ET/G IS Serial to Ethernet Gateway

Download specs – MTL 9476-ET/G IS Ethernet Managed Switch

Download specs – MTL 9475-ET/G IS Ethernet Media Converter

Download specs – MTL 9478-ET/G IS Ethernet Isolator

Download specs – MTL 9479-ET/G IS Ethernet Wireless Access Point/Bridge

Certifications and compliances

Location of Unit :

Zone 1, IIB T4 hazardous area (9471-ETG; 9475-ETG; 9476-ETG; 9479-ETG)
Zone 1, IIC T4 hazardous area (9471-ET; 9476-ET; 9479-ET)
Zone 2, IIB T4 hazardous area (9478-ETG, 9478-ETGX)
Zone 2, IIC T4 hazardous area (9478-ET, 9478-ETX)

Certification Codes:

Ex ia IIB T4 Ga (9471-ETG; 9476-ETG; 9479-ETG)
Ex ia IIC T4 Ga (9471-ET; 9476-ET; 9479-ET)
Ex ia op is IIB T4 Ga (9475-ETG)
[Ex ia Da] IIIC T135°C (non-mining)
Ex ia I Ma (M1 mining)
[Ex ia Ga] IIB (9478-ETG, 9478-ETXG)
[Ex ia Ga] IIC (9478-ET, 9478-ETX)
Ex ec IIB T4 Gc (9478-ETG 9478-ETXG)
Ex ec IIC T4 Gc (9478-ET, 9478-ETX)
[Ex ic Gc] IIB (9478-ETG, 9478-ETXG)
[Ex ic Gc] IIC (9478-ET, 9478-ETX)
[Ex ia Da] IIIC (non-mining)
[Ex ia Ma] I (M1 mining)
Ta = -40ºC to +70ºC

Environmental Ratings:

Operating Temperature: -40°C to +70°C
Humidity: 0 to 95% RH, non-condensing

Design features

9471-ET(G) Intrinsically Safe Gigabit Ethernet 4 Port Serial Gateway:

4 Communication Ports – RS232/TTL/485/422 (2 & 4 Wire)
Serial Modbus Protocol
Dual Port Switch 10/100/1000Mbps LAN (daisy-chain capability)
LAN to Serial
Modbus/TCP ⇔ Modbus/RTU (or ASCII) Protocol
Compact dimensions (W: 42 x H: 160 x D: 140 mm)

9475-ETG Intrinsically Safe Gigabit Ethernet Dual Port Media: Converter Switch

Dual 1310nm Fibre-Optic Ports (10Km)
CPU Management Feature
Dual Port Switch 10/100/1000Mbps LAN (daisy-chain capability)
Fibre-Optic Repeater Mode with 2 Local LAN Ports
Compact dimensions (W: 42 x H: 160 x D: 140 mm)

9476-ET(G) Intrinsically Safe Gigabit Ethernet 6 Port Managed Switch:

6 Port Switch 10/100/1000Mbps LAN
6x Gigabit Ports or Mixed Gigabit and 10/100 PoEx Versions
CPU Management Feature
Compact dimensions (W: 42 x H: 160 x D: 140 mm)

9478-ET/X(G) MTL Intrinsically Safe Gigabit Ethernet isolator:

Intrinsically Safe isolator 10/100/1000Mbps LAN
Easy installation with independent Safe and Hazardous links with auto- negotiation
Compact dimensions (W: 42 x H: 160 x D: 140 mm ETG)
Same footprint as 9468-ET for easy migration (ETX)

9479-ET(G)-CSL Intrinsically Safe Gigabit Ethernet WLAN AP / Bridge:

Dual Band 2.4GHz / 5GHz WLAN Support
Access Point (AP) Mode or Client/Bridge Mode
Dual Port Switch 10/100/1000Mbs LAN (daisy-chain capability)
Compact dimensions (W: 42 x H: 160 x D: 140 mm)

Ordering Information

Standard products
Part Number	Description	Hazardous Area Certifications *
9471-ETG	MTL intrinsically safe gigabit Ethernet 4 port serial gateway	ATEX, IECEx & NEC/CEC Approved
9475-ETG	MTL intrinsically safe gigabit Ethernet dual port media converter single/multimode SC connector	ATEX, IECEx & NEC/CEC Approved
9476-ETG	MTL intrinsically safe 6 gigabit port Ethernet switch	ATEX, IECEx & NEC/CEC Approved
9476-ET2G	MTL intrinsically safe 2 gigabit 4 10/100 PoEx port Ethernet switch	ATEX, IECEx & NEC/CEC Approved
9478-ETG	MTL intrinsically safe gigabit Ethernet isolator	ATEX, IECEx & NEC/CEC Approved
9478-ETXG	MTL intrinsically safe gigabit Ethernet isolator – 9468-ET migration version	ATEX, IECEx & NEC/CEC Approved
9479-ETG-CSL	CSL intrinsically safe gigabit Ethernet wireless access point/bridge +	ATEX, IECEx & NEC/CEC Approved
Wireless access point/bridge accessories
Part Number	Description
ANTSMA94	Antenna SMA Plug, length 150mm Gain, 3dBi
ANT94	Antenna TNC Plug, length 150mm Gain, 3dBi
ANT94RA	Stubby Antenna TNC 90° Plug, length 80mm, Gain 2dBi
CSL-RG316-SMA-1000	SMA Bulkhead Socket ⇔ SMA Plug, length 1000mm RG316 Cable Assembly
CSL-RG316-TNC-SMA-1000	TNC Bulkhead Socket ⇔ SMA Plug, length 1000mm RG316 Cable Assembly
Special order products – minimum order quantity applies
Part Number	Description	Hazardous Area Certifications *
9471-ET	MTL intrinsically safe 10/100 PoEx Ethernet 4 port serial gateway	ATEX, IECEx & NEC/CEC Approved
9476-ET3G	MTL intrinsically safe 3 gigabit 3 10/100 PoEx port Ethernet switch	ATEX, IECEx & NEC/CEC Approved
9476-ET4G	MTL intrinsically safe 4 gigabit 2 10/100 PoEx port Ethernet switch	ATEX, IECEx & NEC/CEC Approved
9476-ET	MTL intrinsically safe 6 10/100 PoEx port Ethernet switch	ATEX, IECEx & NEC/CEC Approved
9478-ET	MTL intrinsically safe 10/100 PoEx Ethernet isolator	ATEX, IECEx & NEC/CEC Approved
9478-ETX	MTL intrinsically safe gigabit 10/100 PoEx isolator – 9468-ET migration version	ATEX, IECEx & NEC/CEC Approved
9479-ET-CSL	CSL intrinsically safe 10/100 PoEx Ethernet wireless access point/bridge+	ATEX, IECEx & NEC/CEC Approved

* Select Certification Reports under the Resources tab for full list of certifications
+ 2x antenna required (not included). These need to ordered separately

Brochures

MTL Overview Brochure

(PDF 45 MB , 29/09/2026)