GRAPHTEC gl820 User Manual page 33

CHAPTER 2 Checks and Preparation
(3) Connect the extension terminal cable to the extension terminal base unit.
* Press in the cable until it is securely locked.
(4) Connect the other end of the extension terminal cable to GL820.
* Press in the cable until it is securely locked.
When connecting additional terminals, make sure they are added in a continuous manner.
Any terminals omitted will prevent subsequent terminals from being recognized.
2−20
Extension terminal cable
Extension terminal cable
Unit 10 (CH 181 to 200)
Unit 2 (CH 21 to 40)
Unit 1 (CH 1 to 20)