Ttl Outputs; Ieee 1588 Support - Siemens Ruggedcom RS416P Installation Manual

RUGGEDCOM RS416P
Installation Guide
The RUGGEDCOM RS416P only supports ordinary clock mode. An ordinary clock can be configured as either a
Grandmaster Clock (GM) or a Slave Clock (SC) within the master-slave hierarchy.
Every Ethernet port on the RUGGEDCOM RS416P supports IEEE 1588. For more information, refer to
"IEEE 1588 Support".
Section 1.6.2

TTL Outputs

The PTP card provides a TTL (Transistor-Transistor Logic) output.
The TTL OUT port supports the IRIG-B PWM and PPS signal formats. Enabling/disabling the output port and
selecting the signal format is controlled through the RUGGEDCOM ROS operating system.
The number of devices that can be connected to the TTL Out port is dependent on the cabling type and length,
as well as the input impedances of the devices. The following simplified circuit schematic shows the interface
between an IRIG-B source and connected devices.
Figure 3: IRIG-B Simplified Circuit Schematic
1. Source 2. Cabling 3. Device
The maximum number of devices (N) that can be connected to the source is determined by checking if the
source current (IS) required to drive the connected devices is less than the maximum drive current the source can
provide, and verifying that the load voltage (VL) the connected devices see is greater than the minimum required
voltage.
Section 1.6.3

IEEE 1588 Support

RUGGEDCOM RS416P supports various IEEE 1588 time synchronization capabilities and provides synchronization
in 2-step mode. This mode supports the following clock types:
• End-to-End Slave Clock
• End-to-End Master Clock
• Peer-to-Peer Slave Clock
• Peer-to-Peer Master Clock
TTL Outputs
R R
S C
V
S
1 2
R
/N
L
3
Chapter 1
Introduction
Section 1.6.3,
7