Hardware 3.2 Top view This view tells you where the connectors and light emitting diodes (LEDs) are located on the device. 3.2.1 Eco Control 667E 8/8 System response LEDs Serial interface (V.24) Fig. 2: Top view of Eco Control 667E 8/8 22 Power supply to outputs 8 digital outputs (underneath:red LEDs 152 90 667.751.00 run/stop L2-L2+ failure 24VDC D0 i g1 it al2 O 3 u tp4 u t5 2 46 V 7 DC 0.5A com1 Digital Input 24V DC 24VDC 0 1 2 3 4 5 6 7 L1-L1+ 8 digital inputs (above: green LEDs) Power supply to system