Trimble Outdoors AcutimeTM2000 Synchronization Kit manual Connection Instructions

4 Acutime 2000 Connections

4.3Connection Instructions

This section provides detailed information for connecting the

Acutime 2000's power, timing pulse and data packet lines.

4.3.1Power Connection (Red and Black Wires)

The red wire (Acutime 2000 pin #1) and black wire (Acutime 2000 pin #9) in the interface cable support the power and ground connections, respectively. The Acutime 2000 features a switching DC power supply, which accepts from 8 to 36 volts. The Acutime 2000 is protected against reverse polarity and brief over-voltage conditions; however, sustained over-voltage conditions can cause

permanent damage.

#Warning – Voltages exceeding 36 volts can cause permanent damage to the Acutime 2000's power supply.

The typical power consumption of the Acutime 2000 at an input voltage of 12 volts is 110 milliAmps, or 1.3 watts.

!Note – The Acutime 2000 requires a minimum of 8 volts at the interface connector. When specifying the supply voltage, line losses in the interface cable must be considered. To account for line loss, the supply voltage may need to exceed 8 volts to satisfy the minimum voltage at the Acutime 2000.

4.3.2Timing Pulse Connections

The Acutime 2000 outputs a timing pulse for use in timing and synchronization applications. The timing pulse is generated using an RS-422 line driver circuit (pins #11 and #12). The leading edge of the PPS output pulse is synchronized to UTC. The width of the pulse's leading edge is 20 nanoseconds or less. The exact width and shape of the pulse depends on the distributed capacitance in the interface cable.

Acutime 2000 Synchronization Kit User Guide 4-7