Terminal Board Connection

Terminal Description

1:

MST fuse T1 A / 250 V or T315 mA / 250 V (for power supply 115 VAC / 60 Hz)

2:

L N PE

Mains power input 230 VAC / 50 Hz or 115 VAC / 60 Hz respectively

3:

CH1

Connection switched circuits, max. 250 V, 6 A, 1500 VA (with possibility of programming or manual switching)

4:

+ACCU-

14 V output for powering external devices or charging of external battery

5:

+24V-

DC output for powering other external devices (e.g. school bells), can also be used as a 24 VDC power supply

6:

L1

Slave line connection terminal

7:

+DCFout-

Synthetic DCF output

8:

Channel status indication

9:

DCF reception indication

10:

SMA connector for connecting the GPS antenna

11:

ACCU Connect jumper

12:

I2–I1

Universal switching inputs

13:

O4–O1

Universal switching outputs type OC (Open Connectors)

14:

+14V

TBA

15:

USB for connection of Flash memory drive with switching programs

Note

If the Master clock is powered though +ACCU- connector from a permanent 12–14 VDC power supply, the “Accu connect” jumper needs to be installed.

Do not install the jumper if the Master clock is powered by mains 230 VAC (115 VAC) and equipped with an active battery back-up (12 V accumulator connected to +ACCU-).

In case of no mains power is available and Master clock should be switched on, the “Accu connect” jumper can be set temporarily and when an external 12 V accumulator is connected to +ACCU- connector, the Master clock will start up. Once the Master clock is started, the jumper should be removed.