FX16 Master Controller Technical Bulletin 63
Extension Modules
You can extend the input/output capacity of the FX16 Master Controller
by connecting up to four extension modules via the Local Link
Extension Bus.
An extension module is formed by an XT91D00
processor/communications module and one or more XP expansion
modules. The expansion modules provide input/output capability for the
extension modules. The following are available for the XT91D00
extension module:
• XP91D02: six analog inputs and two analog outputs
• XP91D03: eight digital outputs (triac)
• XP91D04: four digital inputs and four digital outputs (triac)
• XP91D05: eight digital inputs
• XP91D06: four digital outputs 230 VAC (relay) (EU only)
• XP91D07: four digital outputs 24 VAC (relay) (NA only)
Analog inputs to extension modules may be 0-10 V, 0-20 mA or
passive RTD-Ni1000 (Johnson Controls characteristic only), Pt1000, or
A99 sensors.
Voltage and current inputs from differential pressure transducers that
can be linearized by a square root function.
Digital inputs to extension modules are potential-free contacts.
The input is active (true) when the contact is closed.
Digital counters are available in extension modules, which do not have
analog inputs or outputs. Digital counters are associated with digital
inputs. The number of positive transitions of the physical digital input
required to increment the counter can be programmed in the extension
module.
Note: Counter values are saved in Electrically Erasable
Programmable Read Only Memory (EEPROM) by the XT module only
at power down. When you download an application to modules via the
FX16 Master Controller, the increments recorded since the last power
cycle is lost. A power cycle of the XT module immediately before
proceeding with the program download can solve this problem.
Analog outputs in extension modules can be configured to provide
0-10 V, 0-20 mA or 4-20 mA signals. The output is ranged by low
range and high range variables to provide a 0-100% signal to the
extension module.
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