I have been to the EmersonProcess site and they don't have the information i need specific to the boards in the system. Does anyone know where a manual for these boards might be?
Which Q-card do you need info on? I have access to pretty much the full manual set at work (I'm currently at home) so if it is specs you need I might be able to help. There's also an excellent user's website with a lot of information available. It's restricted to system owners, but I guess you must be in that category so there's no reason you can't register.
If you included an e-mail address it might have incurred one of the moderators to make it disappear. The rules are pretty strict about that.
The following is extracted from the WDPF Manual M0-0053.
QAO
There are four points available on the QAO Card. Each point is a three-wire output
comprised of negative, positive, and shield connections. The shield is tied to the
negative side of the outputs. Each D/A converter (point) converts a 12-bit digital
number to a current or voltage field output. These outputs may be unipolar or
bipolar. Eight QAO groups are available.
• G01 provides four, 0 to 20.475 mA current outputs. A 40 VDC supply voltage
is supplied by the QAO Card.
• G02 provides four, 0 to 10.2375 VDC analog outputs.
• G03 provides four analog outputs with a range of -10.24 to +10.235 VDC.
• G04 provides four analog outputs with a range of 0 to 5.1187 VDC.
• G05 provides four analog outputs with a range of -5.12 to +5.1175.
• G06 provides one analog output with a range of -10.24 to +10.235 VDC.
• G07 provides four, 0 to 20.475 mA current outputs. An external 40 VDC supply
is required.
• G08 provides one analog output with a range of -10.24 to +10.235 VDC with a
high-speed update.
QAX
Card Groups
GO1 -5mV to 20mV (-20mV to 20mV at reduced accuracy) 500[Ω] Source Imp.
GO2 -12.5mV to 50mV (-50mV to 50mV at reduced accuracy) 500 [Ω] Source Imp.
GO3 -25mV to 100mV (-100mV to 100mV at reduced accuracy) 1K [Ω] Source Imp.
High-Level Groups
GO4 0 to 1V 1K[Ω] Source Imp.
GO5 0 to 5V 5K[Ω] Source Imp.
GO6 0 to 10V 10K[Ω] Source Imp.
QBO
The QBO card is available in five groups (G01 through G05), offering a variety of
output parameters.
• G01 provides a high-voltage output and a capability of flashing the output and
varying the dead computer timeout
• G02 has high-voltage outputs with steady operation (no flash) and a set value of
62 msec for timeout
• G03 provides logic outputs and is capable of flashing the output and varying the
timeout
• G04 has logic level outputs with steady operation (no flash) and a set value of
62 msec for timeout
• G05 is the same as G03 except that a 10 kWon card pull-up resistor is connected
between pins 19A and 19B.
QCI
The QCI card is available in two groups and provides the following features:
• Dual on-card contact-wetting power supply for low power consumption
• Separate status-indicating LEDs for each input
• Compatible with any DIOB controller
• IEEE surge-withstand protection
• Optical isolation for each input
• Optional digital switch selectable polarity of each bit
The Group 2 QCI provides 16 digitally-filtered contact inputs sharing a common
return line with the ability to invert data-bit polarity (G01 does not have this option
and is no longer manufactured).
QRC
QRC has an entire manual dedicated to it: M0-0054
QRT
The QRT card uses an electrical isolation circuit (transformer) to separate the
analog input from the digital counting circuits. The isolation circuit provides power
for each analog input channel in addition to providing precise timing from a stable
frequency. This timing is generated on the digital side of the QRT card circuits.
Each analog input circuit contains circuitry for signal conditioning, biasing,
auto-zero and auto-gain correction, and a clocked voltage-to-frequency converter.
Offset and gain correction factors are calculated periodically by the QRT card
microcomputer. The frequency of the offset and gain calibration cycle is determined
by a constant which has been programmed into the memory of the system
controller.
In process control and monitoring applications where temperature must be
measured in various locations, a three-wire Resistance Temperature Detector (RTD)
input signal is connected to bridge the amplifier circuits.
The QRT card provides the bridges, converters, and multiplexers to interface four
isolated RTD inputs asynchronously to a process control or monitoring system.
Copper, platinum, or nickel RTDs can be interfaced to the QRT card.
The QRT card includes an on-board 8039 microcomputer which, in addition to
supervising voltage-to-frequency conversion, converts the digitized voltage reading
to a percent span of the full scale input voltage, and also performs periodic QRT
card calibration.
The QRT card is a voltage input card with four individually-isolated analog input channels.
The front end is designed to convert field signals to a proportional frequency.
There are two QRT card groups:
• G01–Full Scale 10 mV Nominal
10 VDC ref x Actual input
1000
• G02–Full Scale 33-1/3 mV Nominal
10 VDC ref x Actual input
300
where:
10 VDC ref = 10 VDC [&177;]1 Percent
The on-card controller is common to all four input channels and converts the
variable frequencies to a parallel, 12-bit word. It also provides offset and gain
correction and controls the interfacing to the DIOB.
Both QRT card groups include the following features:
• IEEE surge withstand capability
• Auto-zero, auto-gain corrections
• Each channel is electrically isolated from the other channels and the UIOB or
DIOB ground. If a twisted pair cable must be used, every two analog channels
will have a common ground.
• On-card memory (buffer) for storing conversion results
• Normal and common-mode rejection
If you need more detail you're going to have to get in touch with Emerson in either Pittsburgh or Warsaw. I deal with the Warsaw office and they're usually very helpful.
