User Guide
Table Of Contents
ES820 Bridge: Hardware
4
when the zeroize is pressed, the function is executed as
soon as power is applied. This pin would commonly be tied
to a push button.
The 37-pin connector provides support for six LEDs, five
controls, two Ethernet ports, one USB port, and one RS232
COM port.
Table 1. ES820 37-Pin I/O Connector Pin-Outs
pin signal dir description
1
GND - USB pin 4 Ground
2
USB D+ Bi USB Data+ pin3, twisted pair+
3
USB D- Bi USB Data- pin2, twisted pair-
4
USB Vcc - USB pin1 Vcc (5V), up to 200mA
5
Enet2 Link/Act LED Out LED2-, active Lo (8mA @2V diode)
6
Radio2 LED Out LED3-, active Lo (8mA @2V diode)
7
Radio1 LED Out LED4-, active Lo (8mA @2V diode)
8
Status LED Out LED5- active Lo (8mA @2V diode)
9
Power LED Out LED6- active Lo (8mA @2V diode)
10
LED Power -
3.3V through 10 ohms, 48 mA max, 330mA shorted;
Connect to the six LED+ pins
11
Enet2 D- - Enet 2- RJ45 pin 7 Cat5 twisted pair4
12
Enet2 RX- In Enet 2- RJ45 pin 6 Cat5 twisted pair2
13
Enet2 TX+ Out Enet 2- RJ45 pin 1 Cat5 twisted pair1
14
Enet2 TX- Out Enet 2- RJ45 pin 2 Cat5 twisted pair1
15
Enet1 D- - Enet 1- RJ45 pin 7 Cat5 twisted pair4
16
Enet1 RX- In Enet 1- RJ45 pin 6 Cat5 twisted pair2
17
Enet1 RX+ In Enet 1- RJ45 pin 3 Cat5 twisted pair2
18
Enet1 TX- Out Enet 1- RJ45 pin 2 Cat5 twisted pair1
19
GND - COM, RS232 Ground (Monitor Port)
20
COM TXD Out COM, RS232 Xmt (Monitor Port)
21
Enet1 Link/Act LED Out LED1- , active Lo (8mA @2V diode)
22
RF Kill_n (Toggle) In SW1, RFKILL, active Lo
23
Reset_n (PB) In SW3, Reset, active on falling edge
24
Blackout_n (Toggle) In SW5, Blackout, active Lo
25
Enet2 D+ - Enet 2- RJ45 pin 8 Cat5 twisted pair4
26
Enet2 RX+ In Enet 2- RJ45 pin 3 Cat5 twisted pair2
27
Enet2 C+ - Enet 2- RJ45 pin 4 Cat5 twisted pair3
28
Enet1 D+ - Enet 1- RJ45 pin 8 Cat5 twisted pair4
29
Enet1 C- - Enet 1- RJ45 pin 5 Cat5 twisted pair3
30
Enet1 TX+ Out Enet 1- RJ45 pin 1 Cat5 twisted pair1
31
COM RXD In COM, RS232 Rcv (Monitor Port)
32
Zeroize (PB) In SW2, Zeroize, active on rising edge
33
Power_n (Toggle) In SW4, Power on, active Lo
34
Enet2 C- - Enet 2- RJ45 pin 5 Cat5 twisted pair3
35
GND - Ground
36
Enet1 C+ - Enet 1- RJ45 pin 4 Cat5 twisted pair3
37
GND - Ground