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6 UMC800 Controller Installation and User Guide Release F
4/01
I/O modules
Eleven different module types can be installed in the controller to support both analog and digital inputs
and outputs of various types and signal levels. The signal type and I/O capacity for each module type is
indicated in Table 1.
Table 1 Controller plug-in I/O module types
Module Type Signal Types Maximum
I/O
I/O per
card
Maximum no.
of cards
Universal Analog Inputs (AI) mV, V, mA, T/C, RTD, Ohms 64 4 16
Analog Outputs (AO) 0 mA to 20 mA 16 4 4
Digital Inputs (DI) - 4 types:
AC 100/240 Vac 96 6 16
DC 24 Vdc 96 6 16
Logic Dry contacts
(5 mA - 5 Vdc)
96 6 16
16 point Dry contacts 48 16 3
Digital Outputs (DO) - 4 types:
AC 100/240 Vac 96 6 16
AC
High current outputs
100/240 Vac
With:
2 outputs rated @ 2 A
4 outputs rated @ 0.5 A
12 2 12
DC 24 Vdc 96 6 16
Relay SPST normally open (NO) or
normally closed (NC) contact.
(User configurable)
60 6 10
Pulse Input/Frequency Input 24 Vdc 64 4 16
pH Power Module ± 15 Vdc 8 4 2
NOTE: Total combined digital I/O is 96 points.
Control architecture
The UMC800 uses a function block configuration architecture to develop control strategies for both analog
and digital operations. A function block may represent a physical input or output, a group of physical inputs
or outputs, an internal calculation, or an internal function such as a PID algorithm. More than 70 standard
UMC800 function block algorithm types are available for configuring analog and logic functions.
Typically, a function block algorithm type may be used any number of times up to the limit of 250 blocks.
Some of these with specific limitations are:
• Control loops (i.e., PID, ON/OFF, TPSC, and Carbon potential)—eight or sixteen maximum
• Setpoint programmer and associated support blocks—four maximum
• Setpoint Scheduler and associated support blocks—one maximum
• Time proportioning output blocks—sixteen maximum
• Pushbutton blocks—four maximum
• 4 Selector Switch blocks—four maximum
• Modbus Slave blocks—sixteen maximum