iPAM400 – Product Manual
U-0629-0171.doc – Issue: 04 complete, approved
Page 14 of 138
Contact Closure to Supply (+ve going Input)
In this method a contact closure is not made to
ground, but to a local or remote supply, with a fused
connection to ground. This may be appropriate,
depending on the signal source.
BMB01
DIGITAL INPUT (1 TO 12)
I
OPTO ON
WHEN CONTACT
CLOSED
+
-
12-40 V
CONTACT
CLOSURE
TO SUPPLY
Contact Closure to Positive Voltage Source
(+ve going Input)
As per Contact Closure to Supply, but to an
alternatively switched voltage source, such as a
suitable output from another piece of equipment.
BMB01
DIGITAL INPUT (1 TO 12)
I
OPTO ON
WHEN CONTACT
CLOSED
+
-
12-40 V
FROM
REMOTE
EQUIPMENT
For reliable operation in all examples it is recommended that the 0 V reference be taken back
to the 0 V of the equipment that supplies the +ve signal be it the local or a remote supply.
2.1.2.8.2 BMB01 Analogue Inputs
Analogue inputs 1 to 12 provide a contact input function via a non-isolated analogue interface with an
internal pull-up (4k7 ohms) to 5 V.
The contact input operates in two modes: ‘non-monitored’ and ‘monitored’. Each contact is individually
selectable between these two modes.
Non-Monitored Contact
1
Simple contact closure.
BMB01
ANALOGUE
INPUT
(1 TO 12)
CABLING TO CONTACT
+5 V
4k7 ohms
0 V
THRESHOLD= 2.5V
AL 1 - 12
1
Non-monitored contact is not implemented in the iPAM400 application at the time of publication of this document.
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