User's Manual
35
Terminal Block
The MT880 provides one 8-pin terminal block plugs for input/output signals.
With reference to the illustrative figures below, Insert the terminal block plugs
into the terminal block sockets on the rear side of the MT880.
Terminal Block Pin Assignment
Pin Wire Color
Name Pin Wire Color
Name
1
Red
5
Orange RS485_1+
2
Red
VIN-12V
6
Yellow RS485_1-
3
Black
7
Green RS485_2+
4
Black
GND
8
Blue RS485_2-
Relay Connector
Pin
Name
Description
1
C Relay 1 Common
2
NC Relay 1 Normal Close
3
NO Relay 1 Normal Open
Relay Output
RL – CTRL = High R (C & NO Linked
RL – CTRL = Low R (C & NO Linked