RT411
Chapter 4
–
Installation
24
RT411
Table 2: Jumper Selection of Time Input
Closed Jumper
Electrical Input
Opened Jumper
Optical Input
The jumper connections must use insulated flameproof flexible cable with a 1.5 mm²
cross section, 70 °C thermal class, and 750 V insulation voltage.
Optical Outputs
The RT411 has 10 outputs for multimode optical fiber as shown below.
Figure 11: Optical Outputs
All optical and electrical outputs have the same signal as the one applied in the time
reference input. The length of the optical fiber cables should not exceed 2 km.
Electrical Outputs
The RT411 has 10 electrical outputs, 8 using the Euro Type connectors and 2 using the
BNC connectors.
Figure 12: Electrical Outputs
All optical and electrical outputs have the same signal as the one applied in the time
reference input.
More than one device can be connected in parallel from one TTL output. The maximum
number of devices that can be connected to the TTL output depends on the current that
each device’s input uses. As the maximum current supplied from each TTL output is
150mA, the sum of the currents from all devices connected cannot exceed this value
(cable resistance should be considered). The TTL voltage level is 5V.
Electrical cable length should not exceed 100m.
To minimize EMC effects in IRIG-B signals, the use of fiber-optic cable is recommended
for distances greater than 3 m.
The following information is available in the top of the unit, but if it is already installed
in the panel, it may be useful when handling the Euro Type connector for TTL outputs
