Nor-Cal IQ+ Adaptive Pressure Controller - Manual (Page 12)

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IQ+ OP-LIT 9/08
Vacuum Gauge Interface
The pressure signal from one or two vacuum gauges can be interfaced to the
IQ+ controller module through the connector labeled GAUGE. In addition,
±15 VDC is available as an option to power such gauges from these ports.
NOTE: If the power requirement of the gauge(s) used
exceeds the rated power output, then a separate power
source must be used. ±15V@1500mA.
When only one gauge is used, then the pressure signal must be connected to
the CDG1+ and CDG1- signal pins. Use of two gauges requires adhering to
the following:
The full scale range of the two gauges used must be set prior to use. See sec-
tion 6.0.
Serial interface
An RS-232 serial interface is available on all controller models. Please refer to
the Section 6.0 for a full description of the communications protocol and a
listing of all active serial commands. A three-wire connection completes the
communications consisting of Rxd (data from the IQ+), Txd (data to the IQ+)
and digital ground.
NOTE: CTS, RTS and DSR connections
are neither needed nor available.
NOTE: The default factory RS-232 communications parameter
settings are 9600 Baud, 1 stop bit and no parity. These settings
can only be changed on models with DIP switches, and changing
the setting requires cycling IQ+ input power off then back on.
Every serial input command sent by the HOST has an end-of-line delimiter, car-
riage return ASCII 0x0D [hex], or the line feed character ASCII 0x0A [hex], or
the carriage return and line feed character in that order. The IQ+ device end-
of-line delimiter is the carriage return and line feed characters.
DeviceNet Interface
(not available on all models)
The five-pin circular DeviceNet port allows for complete remote control,
monitoring and power supply of the IQ+ controller in a cost effective and reli-
able way. In addition to the connector are two status LEDs labeled Mod and
Net, as well as three rotary switches labeled MSD, LSD and RATE. A complete
explanation of the DeviceNet physical and software interfaces can be found in
Sections 8 and 9.
Service Port
The Service Port is reserved for factory authorized service technicians
Indicating LEDs
There are a host of indicating LEDs on the IQ+ controller, depending on
model. In general, the green Power LED is illuminated whenever power is
applied to the device. The green Ctrl LED is illuminated whenever the IQ+ is
in set point control (pressure or position). The amber Fault LED is illuminated
briefly during the initialization sequence after power-up but primarily if the
IQ+ device enters a fault state. Two LEDs are located adjacent to the OPEN
and CLOSE switches, and are illuminated whenever the valve position is within
2% of either limit.
Switches
Some controller models have a bank of four DIP switches labeled SW1. These
switches are used to define valve size. Relative to the printed text on the over-
lay, switch 1 is on the left
A switch in the “up’ position is OFF or “0”
A switch in the “down” position is ON or “1”
Refer to table 5.1 below for a complete listing of valid DIP switch settings.
Primarily intended for operation during installation or troubleshooting, the
IQ+ also features two push button switches on the face of the controller that
can be used to drive the valve fully open or closed. To prevent inadvertent
valve operation, these switches cannot be used if the IQ+ valve is in Control
Mode (green Ctrl LED on).
5.0 - IQ+ Controller module Interfaces
IQ+ controllers have several interfaces available for communications and connectivity to peripheral devices, depending on model. These are described by func-
tion below. Please also refer to Figures 3.1 – 3.4 and their associated Tables for the specific connectors and their pin assignments.
Sw1 Sw Sw Sw4 valve SIZe
0 0 0 0 1 inch
0 0 0 1 1.5 inch
0 0 1 0 2 inch
0 0 1 1 2.5 inch
0 1 0 0 3 inch
0 1 0 1 4 inch
0 1 1 0 6 inch
0 1 1 1 8 inch
1 0 0 0 10 inch
1 0 0 1 12 inch
1 0 1 0 14 inch
1 0 1 1 16 inch
1 1 0 0 TBD
1 1 0 1 TBD
1 1 1 0 TBD
1 1 1 1 TBD
TAbLE 5.1 – DIP SWITCH CONFIGURATION