Unit installation

BMB01 – Installation Guide
BMB01 Terminal Description
Pin No Signal Description / Operation
1 0V OUT 0 V connection for Analogue Inputs
2-13 AI1-AI12
Analogue Inputs (internal 4.7 kΩ pull-up to +5 V)
14-25 DO1-DO12 Digital Outputs (open-collector)
26 +24V OUT +ve supply (as 24 V in) for open-collector outputs. Resetable internal 1.6 A fused.
27-42 DI1-DI8
Digital Inputs 1 to 8
+ = Opto-anode (with internal 4.7 kΩ pull-up to +5 V enabled/disabled via link settings)
- = Opto-cathode
43 DI(9-12)+
Common connection to external pull-ups on the anode of the opto-isolators of Digital
Inputs 9 to 12
44-47 DI9-DI12- Digital Inputs 9-12 (opto-cathode)
48 +24V IN 18-40 V Supply In
49 0V IN 0 V Supply In
50 DATA DXP RS485 DATA +
51 DATA DXN RS485 DATA -
52 SCREEN Screen connection for RS485 data
BMB01 Power Connection Options
24V in
0V in
DXP
DXN
SCREEN
+ SUPPLY
(e.g. V400 or X400 AUX OUT)
0 V IN
DXP
DXN
CHASSIS 0V
RS 485
CONNECTOR
BMB01
CENTRAL RACK
24V in
0V in
DXP
DXN
SCREEN
0 V IN
DXP
DXN
CHASSIS 0V
RS 485
CONNECTOR
BMB01
CENTRAL RACK
+
-
LOCAL
ISOLATED
SUPPLY
EXAMPLE SHOWING LOCAL POWER
EXAMPLE SHOWING POWER FROM CENTRAL RACK
!
!
Power to the BMB01 can either be local or from the central rack equipment.
If a local power supply is used, a 0 V connection must be made between the central rack and the BMB01
for correct operation of the data-link. The local power supply must be isolated from ground to avoid
potentially large ground currents flowing in the 0 V interconnection if the BMB and central rack are an
appreciable distance apart.
If powered from the central rack, the cabling should be selected so that the total load does not cause
excessive voltage drop (>4 V) in the 0 V connection otherwise incorrect operation of the data-link may
occur
Issue: 02 Complete, Approved
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