9478-ETG MTL Intrinsically Safe Gigabit* Ethernet Galvanic Isolator
• Intrinsically Safe ATEX / UKEX / IECEx Certification /
North America (METC/US) approval
• Galvanically Isolated Safe and Hazardous Area Ports
• Dual Port Switch 10/100/1000Mbs LAN
(daisy-chain capability)
• Single IS Ethernet Switch Port 10/100/1000Mbs* LAN
• Safe and Hazardous sides link independently with
auto- negotiation
• Status LEDs
• Single 12V/24VDC (10-30V) supply
• Compact dimensions (W: 42 x H: 160 x D: 140 mm)
• [Ex ia Ga] IIB, [Ex ia Da] IIIC (non-mining),[Ex ia Ma] I (M1 mining).
• Ta = -40ºC to +70ºC
• Safe Area or Zone 2 / Zone 22 mounting

The 9478-ET(G) is an Intrinsically Safe (IS) Ethernet Isolator
suitable for Safe Area or Zone 2 / Zone 22 mounting for connection to
intrinsically safe certified devices mounted in a Zone 0 location. The IS
Ethernet isolator allows the interconnection of a Zone 2 or uncertified
safe area device to the intrinsically safe 9400-ET range of Ethernet
networking products,operating in the hazardous area.
The isolating barrier provides a compact alternative solution to fibre
optic cable and media converters and for when it is desirable to use
Cat5e/6 cables in preference to fibre
Transparent operation - 10/100/1000Mbps, Full/Half Duplex with
AutoNegotiation. Supports IEEE 802.3: 10Base-T, 100Base-TX and
1000Base-TX.
The module is supplied as a DIN-rail mounting device.
There are 2x RJ45 (LAN) ports on the Safe Area side that support
10/100/1000 standard Ethernet connections – these can allow
‘daisychaining’ of units together. The single Hazardous Area RJ45
provides an IS LAN connection
* 9478-ETG supports 10/100/1000Mbs on safe area and hazardous area ports
9478-ET supports 10/100Mbs on safe area and hazardous area ports
10/100/1000Mb* IS Ethernet twisted pair (Cat5e/6) RJ45 connection
(100metres length max.) provide total galvanic isolation (Um=253Vac)
from safe to hazardous areas.
The module operates from a single supply in the Safe Area
of 10…30Vdc at approx. 24V @ 110mA or 12V @ 200mA.
The compact and cost effective design makes it the ideal choice for
many applications:
Petrochem -
Mining -
Process Monitoring, Galvanic Isolation...
Underground Communication Links,
Machine Monitoring….
Electrical connections are via cage-clamp and/or screw type plug/
socket terminals along with RJ45 type connectors for the Ethernet
LAN ports.
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