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A EN 12/37
1KHW001493-EN
B.8.2 Testing external real time clock synchronisation (if available)
The external clock source with IRIG-B format has to be connected to the IRIG-B port at the
frontplate of P4LT/P4LU via external cable V9OV.
Testing the external synchronisation using HMI600:
1. Set the time on the PC a few hours back/forward
2. On the Equipment menu point to Commissioning and maintenance menu point to
Eventrecorder and click Set Clock.
3. Click Download date/time to RTC. This sets the RTC to the wrong time.
4. Click Upload date/time from RTC. The date and time displayed at Read RTC date &
time part of the Real time Clock (RTC) box should be correct and not correspond to the
PC-date/time setting.
5. Click Cancel.
6. Set the time on the PC back to the correct time
B.9 Testing of NSD600 with interface G4AI, if present
Designations and abbreviations used:
Designation Meaning
(T.22/..1) Connector 1 of terminal block connected to rack position N22
B.9.1 Inputs
How to activate an input command depends on the jumper settings on G4AI.
• G4AI input programmed as ‘contact and battery voltage’:
Inject a signal at input port with the voltage level U1 according to the jumper settings on
G4AI (24 VDC, 48 VDC, 110 VDC, 220 VDC)
• G4AI input programmed as ‘contact only’:
Short circuit the input port
The way to activate the input port is the same for a Tx command input and a start input.
Activate the input port and check, if the IN LED lights.
B.9.2 Outputs
Depending upon the programmed criteria, activate the required action using the following table.
Check the contact closure of the programmed outputs on G4AI.
Set the link back to an alarm free operation after this test.
Output on G4AI Action to enforce the output
Rx command
Inject a Tx command at the corresponding input at the remote
station
Unblocking Disconnect the RF line coaxial cable
Rx guard Disconnect the RF line coaxial cable
Ack Tx command Inject a Tx command at the corresponding input
TPE link alarm Disconnect the RF line coaxial cable
TPE alarm Disconnect the RF line coaxial cable
TPE hardware alarm Inject a Tx command of length > Max. Tx Trip Duration
G4AI alarm Inject a Tx command of length > Max. Tx Trip Duration
User alarm 1 Depends upon programmed alarm criteria
User alarm 2 Depends upon programmed alarm criteria
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