19
ICC
5.1
Power Supply Electrical Interface
When the gateway is not plugged into a PC via the USB cable, it must be
powered by an external power source or via Power over Ethernet (PoE: refer to
section 5.2). When using an external power source connected to the gateway’s
power and ground terminals, ensure that the power supply adheres to the
following specifications:
Voltage rating ......................... 7 - 24VDC
Minimum Current rating .......... 150mA (@24VDC)
•
ICC offers an optional 120VAC/12VDC power supply (ICC part number
10755) that can be used to power the gateway from a standard wall outlet.
•
The power supply must be connected to the gateway’s terminal block at
terminals TB:5 (POWER) and TB:6 (GND) as highlighted in Figure 1.
Figure 1: Terminal Block Power Supply Connections
5.2
Power over Ethernet (PoE)
The gateway supports the IEEE 802.3af Power over Ethernet (PoE) standard as
a mode A or mode B powered device (PD). In mode A, the Ethernet jack pins 1-
2 (pair #2 in T568B wiring) form one side of the DC supply and pins 3-6 (pair #3
in T568B) form the other side. These are the same two pairs used for data
transmission in 10Base-T and 100Base-TX, allowing the provision of both power
and data over only two pairs in such networks.
In mode B, the Ethernet jack pins 4-5 (pair #1 in both T568A and T568B cabling
standards) form one side of the DC supply and pins 7-8 (pair #4 in both T568A
and T568B) provide the return; these are the "spare" pairs in 10BASE-T and
