3 Installation
3.1 System 6844(RC) in 3U / Table-Top / Wall Housing
3.1.1 Installation of the 19 Inch 3U Rack
The System is assembled in a standard 3U/42HP or 3U/84HP 19" housing for control cabi- net installation (for dimensions see Chapter 1.2.2 System Design 6844(RC) in 19 inch
Rack 3U/42HP and 3U/84HP)
The following steps are to be carried out:
Place the rack in the control panel and fix to the mounting brackets on the front side of the rack using 4 screws.
The ventilation apertures on the top and bottom sides must not be covered. Otherwise passive ventilation (convection) will not be effec- tive and lack of convection and / or thermal coupling with surrounding equipment may give rise to an excessive equipment operating tem- perature.
At higher temperatures an active cooling / ventilation is recommended.
Ensure that there is sufficient space between the connection side of the rack and the control panel to allow for the connection of cables to the System.
INSTALLATION
3.1.3 Mounting the Wall Housing
3.1.4 Earthing
The System 6844(RC) is usually earthed via the PE cable of the power supply.
An additional earth cable (up to 16mm2) for surge protection purposes can be connected by means of the earth screw located on the System housing.
3.1.5 AC Power Supply
Attention should be paid to the following when connecting the power supply:
Correct voltage type (AC or DC)
Voltage level
The power feed is via an input connector with EMI line filter compliant with IEC/EN 60320- 1/C14
Plug the input connector into the System’s mains power inlet.
Connect the input connector to the mains power supply and switch the line circuit breaker on.
The System 6844(RC) can be damaged if incorrect voltage is connected.
3.1.5.1 Safety and Warning Instructions
Please read these instructions fully in order to guarantee safe operation of the equipment and to be able to use all the functions.
Caution: Never work on an open unit when voltage is applied!
INSTALLATION
The System 6844(RC) is an installation device. Installation and commissioning may only be carried out by suitably qualified specialist personnel. In doing so the respective country- specific specifications must be observed (e.g. VDE, DIN).
Before commissioning ensure that:
The power supply has been connected correctly and electrical shock protection is in place
The earth wire is connected
All supply cables are correctly sized and fused
All output cables are suitably sized or specially fused for the max. output current of the equipment
Sufficient convection is guaranteed
The equipment contains life-threatening components and a high level of stored energy.
3.1.5.2 Power Supply Unit Specifications
All AC power supply specifications are described in Chapter 11 Technical Data.
3.1.5.3 Fusing
Pay attention to the correct fusing of the power supply when connecting the System 6844(RC).
The corresponding performance data can be taken from the equipment nameplate. The Sys- tem 6844(RC) is currently fitted with a power supply unit with a power consumption of max. 40VA.
If the internal fuse (device protection) trips it is highly probable that the equipment is faulty. In this case the device should be checked in the facto- ry.
3.1.6 DC Power Supply (Option)
Ensure that the external power supply is switched off. When connecting the supply cable make sure that the polarity is correct and the equipment is earthed.
The cable of the power supply is connected using a 2-pole plug connector with additional earth connection and interlocked with the System 6844(RC):
+Vin: Positive pole (contact 1)
–Vin: Negative pole (contact 2)
PE: Earth
The System 6844(RC) can be damaged if incorrect voltage is connected.
Earthing:
By default the minus pole (-Vin) and earthing (PE) are connected sys- tem-sided.
INSTALLATION
3.1.6.1 Power Supply Unit Specifications
All DC power supply specifications are described in Chapter 11 Technical Data.
3.1.6.2 Fusing
Pay attention to the correct fusing of the power supply when connecting the System 6844(RC).
The corresponding performance data can be taken from the equipment nameplate. The Sys- tem 6844(RC) is currently fitted with a power supply unit with a power consumption of max. 40VA.
If the internal fuse (device protection) trips it is highly probable that the equipment is faulty. In this case the device should be checked in the facto- ry.
3.1.7 Synchronization Source Connection
Depending on the version different synchronisation signals can be connected to the System 6844 (RC)
3.1.7.1 GPS Antenna Equipment
The GPS antenna equipment coaxial cable is connected to the BNC connector marked "An-
tenna" on the control board 6844(RC) of the System. More detailed specifications for the in-
stallation of the antenna equipment, such as cable lengths and types, can be found in the manual "Antenna Equipment GPS".
3.1.7.2 Serial String
The synchronisation string is always connected to interface COM1. The correct signal level has to be considered.
3.1.7.3 PPS (Pulse per second)
For PPS input an additional hardware depending on the signal level for synchronisation is required.
Insofar this option is factory set the connection and the signal level are stat- ed in the supplied manual.
3.1.7.4 DCF77 Pulse
For DCF77 pulse input an additional hardware depending on the signal level for synchronisation is required.
Insofar this option is factory set the connection and the signal level are stat- ed in the supplied manual.
INSTALLATION
3.1.8 COM0 / COM1 Serial Interfaces Connection
The serial interfaces are assigned as follows:SUB-D female Connector 25-pole
COM0
Pin Assignment1 n.c. 2 TxD RS232c 3 RxD RS232c 4 n.c. 5 n.c. 6 n.c. 7 0V GND 8 n.c. 9 n.c. 10 n.c. 11 -TxD RS422 (low active) 12 +TxD RS422 (high active) 13 n.c. 14 n.c. 15 n.c. 16 n.c. 17 n.c. 18 n.c. 19 n.c. 20 n.c. 21 n.c. 22 -RxD RS422 (low active) 23 +RxD RS422 (high active) 24 n.c. 25 n.c.
SUB-D female Connector 9-pole
COM1
Pin Assignment1 GND 2 TxD RS232c 3 RxD RS232c 4 +RxD RS422 (high active) 5 -RxD RS422 (low active) 6 n.c. 7 n.c. 8 -TxD RS422 (low active) 9 +TxD RS422 (high active) n.c.: not connected
3.1.9 DCF77 Antenna Simulation (77.5kHz) Connection
The antenna cable of the DCF77 System to be synchronized is connected to the System’s BNC socket marked "DCF-Sim". A type RG59 coaxial cable is recommended as standard for the connection between hopf_Systems.
3.1.10 Function Boards Connection / Input- and Output Modules
The necessary steps to connect the Function Boards should be consulted in the respective technical specifications of the Function Boards present in the system.
INSTALLATION