M-Bus Connection; M-Bus Considerations - Honeywell CIPer 50 Installation & Commissioning Instructions

M-BUS CONNECTION

The CIPer Model 50 controller supports M-Bus Master
functionality via its onboard RS232 / RJ45 socket.
It uses standard PW3/PW20/PW60 converters to connect
to the M-Bus devices.

M-Bus Considerations

Max. no. of M-Bus devices per CIPer Model 50: 60.
Bus Length
• Max. M-Bus length: 1050 feet from PW3 / PW20 /
PW60, at communication rates of 9.6 kbps or slower
with shielded, twisted pair cable: 3322 or 3251.
• The M-Bus can be extended to 3000 feet, depending
upon the communication rate, and provided that the
following electrical limitations are observed:
Bus voltage must at no point fall below 12 VDC
˗
Maximum cable capacitance of 180 nF
˗
For bus length extension, M-Bus repeaters can be used,
but have not been tested by Honeywell. Hence, it is the
responsibility of the installing / commissioning personnel
to ensure proper functioning.
Wiring Topology
M-Bus meters are connected to the bus cable in parallel.
Fig. 51. Allowed M-Bus wiring topology
Cabling CIPer Model 50 to
PW3/PW20/PW60
• Use the XW586 cable between the RS232 / RJ45 socket
of the CIPer Model 50 and the PW adapters.
• The XW586 cable has a length of 5.4 ft, and the pin-out
listed in Table 25.
• In case a third-party cable is used instead of the XW586
cable, the third-party cable must have a max. length of
45 ft and a max. cable capacitance of 2,500 pF.
Table 24. CIPer Model 50 RS232 / RJ45 socket
specifications
RJ45 plug,
RS232 function
pin no.
1
2 RxD
3 TxD
4
5 GND
6
7
8
CIPer MODEL 50 CONTROLLER – INSTALLATION & COMMISSIONING INSTRUCTIONS
Fig. 52. CIPer Model 50 RS232 / RJ45 socket
Table 25. RS232-to-PW cable specifications
RJ45 plug,
pin no.
RJ45 plug with clip at front
Fig. 53. XW586 power / communication cable details
Cabling PW3/PW20/PW60 to M-Bus
• Use shielded, twisted pair cable J-Y-(St)-Y 2 x 2 x 0,8.
• Shielding is especially recommended when the M-Bus
cable is installed in areas with expected or actual
electromagnetic noise. Avoiding such areas is to be
preferred.
• Connect the shield to a noise-free earth ground – only
once per M-Bus connection.
• Power the CIPer Model 50 controller and the PW M-Bus
Adapter with separate transformers – see WARNING
below.
NOTE: If, alternatively, only a single transformer is avail-
41
8 7 6 5 4 3 2 1
RS232 function
1 DCD
2 RxD
3 TxD
4 DTR
5 GND
6 DSR
7 RTS
8 CTS
-- Not used
SHIELD
+5V
XW586
able, when connecting a laptop, PC, web browser,
CL-Touch, or 3 -party touch panel to the USB 2.0
rd
Device Interface on the front of the CIPer Model
50 controller, use an optical isolator for the USB
connection or substitute an M-Bus Mikro-Master
USB (Relay GmbH, D-33106 Paderborn) for the
PW M-Bus Adapter.
9-Pin sub-D
connector pin no.
1
2
3
4
5
6
7
8
9
RS232 plug
sub-D male
31-00233EFS-01