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Copyright 2010 Unitech Electronics Co., Ltd. All rights reserved. Unitech is a registered trademark of Unitech Electronics Co., Ltd.
Using the Terminal Block
The MT688 provides two 12-position
terminal blocks for input/output signals.
Insert the wire’s stripped end into the
desired terminal block position. Tighten
the lock screw to secure the wire.
Terminal Block Pin Assignment
J2 Terminal Block Port
Pin Name
Description
Pin
Name
Description
1
D1+ Photo-IN Anode (+)
7
D4+
Photo-IN Anode (+)
2
D1-
Photo-IN Cathode (-)
8
D4-
Photo-IN Cathode (-)
3
D2+ Photo-IN Anode (+)
9
PLC TX PLC TX
4
D2-
Photo-IN Cathode (-)
10 PLC RX PLC RX
5 D3+ Photo-IN
Anode
(+)
11 12V
External DC 12V input
6
D3-
Photo-IN Cathode (-)
12 GND
GND
J3 Terminal Block Port
Pin
Name
Description
1
R1-C
Relay 1 Common
2
R1-NO
Relay 1 Normal Open
3
R1-NC
Relay 1 Normal Close
4
R2-C
Relay 2 Common
5
R2-NO
Relay 2 Normal Open
6
R2-NC
Relay 2 Normal Close
7
R3-C
Relay 3 Common
8
R3-NO
Relay 3 Normal Open
9
R3-NC
Relay 3 Normal Close
10
R4-C
Relay 4 Common
11
R4-NO
Relay 4 Normal Open
12
R4-NC
Relay 4 Normal Close
Summary of Contents for Tashi MT688
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