15
Medical Gas Central Alarm - Medipoint 125 Digital Alarm
4233500107.03
2.2.5 Multiple Panel Data Connection (see figure 15
and table 3).
For multi-panel installations link the alarms together
using the IN [A][B] and OUT [A][B] in a chain as shown
in figure 15.
For the two panels at the endpoints of the network the
termination resistor should be switched “ON” with S1.
For all other panels, S1 should be switched “OFF”. See
figure 15.
The alarm uses the EIA/TIA-485 (RS-485) data
communications specification. Cable used for the alarm
data must be suitable for these signals. The follow cable
types are recommends, see table 3.
TABLE 3: RECOMMENDED DATA CABLE
Manufacturer / Reference
Part Number
Belden 8132 (2 pr, Non-Plenum)
2005421
Belden 82842 (2 pr, Plenum)
Alphawire 6455 (2 pr, Non-Plenum)
Figure 15 - Alarm data connection.
MP125D (1)
S1: ON
IN
OUT
A
B
A
B
S
MP125D (2)
S1: OFF
IN
OUT
A
B
A
B
S
MP125D (3)
S1: ON
IN
OUT
A
B
A
B
S
Note - “S” terminal is for connecting the screen
cable.
2.2.6 Remote audible(s). Connect (see figure 16).
Connect remote audible device(s), if fitted, to power
supply PCB plug (ter and -).
Remote Audible
Connection [+] [-]
Figure 16 - Remote audible connection.
2.2.7 Alarm output fault relay connection (see figure
17)
For outputting an alarm fault to another MP125D or
alternative alarms connect to the “Salve” power supply
plug.
Data Transmission connections
IN [A] [B], out [A] [B] and [Screen]
End of line switch
[S1]
Figure 17 - Output alarm relay signal connection.
Output Relay For Transmitting Single Event Alarm
[COMMON] [N/O]
2.2.8 Source equipment alarm connections (see figure
18)
Source equipment alarm connections are connected to
Channel 1 through to Channel 5 power supply plug
.
Gas Service Connections, Channel 1-5
Figure 18 - Source equipment alarm electrical
connections.
