MOBILTEX® DATA LTD.
Calgary, Alberta
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TITLE:
RMU1 Installation and Configuration Guide
DOCUMENT NO.:
RMU1-MAN-001
SHEET:
27 of 53
REV:
1.14
Figure 21 Separate AC/DC Coupons Flex Connections
External links between bolts 6-8 and 4-5 are needed. An external 10 ohm shunt resistor between bolts 5 and 6 is also
needed. Alternatively, CPN3A (Mobiltex P/N A20A0333401) can be installed as shown in the figure above; this board
contains the necessary links and resistor.
5.4 Isolated Digital Input
When enabled in the configuration, an isolated digital input is present on the pins labelled ‘BOND-/MIT AC’ and
‘BOND+/MIT AC’. The input is bidirectional (polarity insensitive); an input signal with a magnitude greater than
3VDC will change the input to the active state. The digital input state may replace the transmission value for any data
slot or the cap detector state by setting the appropriate options in the RMU1 configuration.
The isolated input may be used to monitor a dry set of contacts by wiring the contacts in series with an external power
supply. See Figure 22 for a connection example. Other electronically switched voltage sources may also be used.
Note that when using the isolated digital input, the analog measurement capability, for any measurement type slots that
normally use the associated connector pins, will be disabled.
>3VDC
Figure 22 Isolated Digital Input Connection Example
