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'''10-pin terminal connector''' "screw - type" - power, relays, RS-485 <br>
[[Файл:Wh bottom view cropped2.jpg|600px]]

Pins assignment (from left to right):
::1. Common24V
::2. "+" line of  24В
::3. Isolated gnd for LAN/WAN cable shields
::4. Relay #1 N.O.
::5. Common wire for relays #1,2 
::6. Relay #2 N.O.
::7. N.C.
::8  RS-485 signal ground
::9 Data- (:B) RS-485
::10 Data+ (:A) RS-485


:: Connection of RS-485 - refer to  [//wiki.webhmi.com.ua/index.php/%D0%9F%D0%BE%D0%B4%D0%BA%D0%BB%D1%8E%D1%87%D0%B5%D0%BD%D0%B8%D0%B5_RS-485 this.] 
:: Switching capacity for SSRs - max. current 100мА ~/=, max. voltage - up to 350V.
:: When using shielded Ethernet cable its shield will connect to GND terminal, which in his turn recommended to wire to ground for better noise protection.
:: Voltage input 24В +/- 10% (15%).<br><br><br>

Connection of '''external WiFi antenna''' (RP-SMA type) 
[[Файл:RP-SMA male.jpg|100px|left|border]]<br><br>

<br><br><br><br><br>
'''USB''' - to connect extra devices like USB-serial adapters, modems etc. (ver. 2.0 USB). <br>
Ethernet connectors '''LAN''' и '''WAN''' - see more [//wiki.webhmi.com.ua/index.php/%D0%9D%D0%B0%D1%81%D1%82%D1%80%D0%BE%D0%B9%D0%BA%D0%B0_%D1%81%D0%B5%D1%82%D0%B5%D0%B2%D1%8B%D1%85_%D1%81%D0%BE%D0%B5%D0%B4%D0%B8%D0%BD%D0%B5%D0%BD%D0%B8%D0%B9/en here].