Technical data

25
Envoy Installation, Commissioning & Operating Manual
SECTION 7 – NETWORKING
A feature of the Envoy is the ability to provide 2 wire (RS 485) communications for repeating and
networking capability. All standard panels of verion 5.0 and above can be networked.
The PCENV-NET is an ‘add-on’ card which provides the RS 485 interface and address switches. A
PCENV-NET is required for each
panel in the network. Up to four panels can be networked. A ‘comms’
terminal is provided on the master pcb as standard (although this is not shown on the schematic
diagrams on the previous pages), but this terminal is not active without the network card fitted.
Network Philosophy
Up to four standard panels can be connected. 1 way or 3 way zone cards can be used in any
combination. Ideally on a four zone system, four indicating zones must be available.
Several interesting scenarios can be achieved:
1. A simple panel with up to three repeaters
2. Connect two zones on one panel two on the other and both panels will show all four zones
3. Connect one zone on each of four panels and display all zones on all panels
4. Have zones on one panel and sounders on another
Other permutations are possible.
Limitations
The system is limited to four zones, although sixteen could be connected, only four can show at one
panel. For example, when zone 1 is put into fire, it will display as zone 1 on all panels regardless of
which panel zone 1 wiring is connected to.
Installing PCENV-NET
1. Turn off power to panel
2. Remove PCENV-M (Master pcb)
3. Locate mounting hole and fit small 3mm threaded spacer (supplied) to PCENV-M. Make sure
insulated washer (supplied) is used under screw head.
4. Plug in PCENV-NET to 10 way header, (see drawing1832M) ensure alignment with small spacer
and check all connector pins are aligned correctly.
5. Fit screw through PCENV-NET into spacer and tighten to secure pcb.
6. The communications cable is connected to ’comms’ terminals at top of pcb (see drawing 1831M)