gefran 650 Series Manual page 4

CLEAR AND EASY TO READ
Up to 9 I/O
INTUITIVE
The green LEDs corresponding to the four mechanical keys (real buttons)
make using these devices highly easy:
- they visually indicate the key pressed
- they guide the user to the key to press (as for
acknowledge of an alarm with latch)
- they indicate inactive functions
- they signal if a key is not recognized
(diagnostics)
4 4
Up to 14 I/O Up to 14 I/O