RTP 3121 User manual

Technical Manual
3121 and 3122
16-Channel
Analog Output Cards

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© 2002 - 2019 RTP Corporation
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RTP’s corporate office for specifics regarding any changes.
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RTP Corporation
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Phone: [phone]
Internet: http://www.rtpcorp.com
Last Updated: 9/12/2019

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TABLE OF CONTENTS
INTRODUCTION........................................................................................4
SPECIFICATIONS.....................................................................................5
CABLING...................................................................................................9
REDUNDANT I/O CARDS PLACEMENT................................................14
3000 Series System with I/O Cards..............................................................14
3100 Series System with I/O Cards..............................................................14
SOFTWARE CONFIGURATION .............................................................15
PLD Upgrade...............................................................................................15
NetArrays Configuration...............................................................................17
Redundant Card ID................................................................................18
Watchdog Timer.....................................................................................18
Bool Disable Testing ..............................................................................18
Integer Error Detection...........................................................................18
Integer Channel Error Status..................................................................19
Integer Card Revision.............................................................................19
Integer Cal Date.....................................................................................19
Integer Cal Serial Number......................................................................19
Float Temperature Input.........................................................................20
Channel .................................................................................................20
I/O Tag...................................................................................................20
Readback Tag........................................................................................20
Type.......................................................................................................20
Comment...............................................................................................20
Default (3100/Non safety system only)..................................................20
Default On (3100/Non safety system only)............................................21
COMPLIANCE WITH CE MARK .............................................................22
ENVIRONMENTAL CONDITIONS ..........................................................24
REFERENCED COMPANIES..................................................................25
DEFINITIONS ..........................................................................................25

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Introduction
The 16-Channel Analog Output Cards provide high-precision analog output signals. This card
can be purchased factory-configured to generate –20 to 20 mA, 4 to 20 mA outputs, or 0 to 20
mA outputs for the current option or 0 to +10 V outputs or –10 to +10 V outputs for the voltage
option. All channels are isolated from RTP chassis ground.
The 16-Channel Analog Output card’s model number determines the channel output options as
follows:
3121 Current Output Channels (-20 to 20 mA, 0 to 20mA or 4 to 20 mA)
3122 Voltage Output Channels (0 to +10 V or –10 to +10 V)
Each channel consists of a digital-to-analog converter, output driver and analog-to-digital
converter. Individual D/A converters generate the sixteen outputs from a single user-supplied 24
VDC power supply. The A/D converter provides a feedback from the channel’s output driver to
ensure that the programmed output equals the actual channel output. The card also includes an
onboard temperature sensor. No field adjustments are necessary after the initial factory setup.
I/O bus checking diagnostics, card address tests, and configuration tests are performed each
time the controller accesses the card. All data and control transfers are performed twice, once
using the actual data and then using the data inverted. Both versions of the data are compared
to verify that all I/O bus data bits are functioning properly. The configuration code from the card is
compared to the I/O configuration to check that the correct card is installed in the rack. I/O Bus
slot address and control signal contention tests also are performed. Any fault detected sets
status bits in an error detection variable returned to the user application program.

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Watchdog timers on the card can open all of the output channels in the event backplane
communication errors persist.
An indicator LED, located near the top of the front panel, indicates the overall health status of the
card. If this LED is on, the card is functioning normally; if it is off, the card is offline. If this LED is
on, but the card is shown in red on the NetArrays IOC screen and cannot be enabled, indicates
an error in the cards calibration data.
Specifications
Module Safety Integrity Level: SIL-3
Address: Determined by the slot of the controller backplane
Number of channels: 16
Isolation: 500 VDC Channel to RTP System
Type of protection: Digital isolators (magnetic)
Type of Loads: Grounded
Common Points between Channels: All channels share an isolated common ground
Monotonicity with no missing codes: Yes
Resolution: 16 bits
Output Response: Outputs are in a high-impedance state at power-up. Outputs
drive to commanded levels when initialized by software.
Outputs are in a high-impedance state when powered-down.
Watchdog Timers:
Programmable 150 ms
Fixed 0.31 to 0.65 seconds
3121
Output Signal Range: -20 to 20 mA Current Outputs
to 20 mA Current Outputs
4 to 20 mA Current Outputs
Output Impedance: Greater than 10 Mwhen outputs turned off
Greater than 235 when outputs turned on
Full Scale Value: 20 mA
Analog output error:
Maximum error at 25 °C: ±0.160% of Full Scale Current (±32 µA)
Temperature Coefficient: ±0.012% of Full Scale Current/ ºC (±0.24 µA/ºC)
Maximum error (-20 to 60 °C):±0.580% of Full Scale Current (±116 µA)
Note: To insure the stated Analog I/O specifications, you need five minutes of warm-up time in a
stable temperature environment.
Value of LSB: 610 nA
Settling Time: Less than 1 ms for full range change
Typical Slew Rate: 0.2 mA/s
Load Resistance: 100 minimum to 600 maximum
Crosstalk between Channels: -71 dB at DC, AC (50 Hz & 60 Hz)

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Non-Linearity: ±0.160% of Full Scale Value
Repeatability: ±0.160% of Full Scale Value at fixed temperature
Readback:
Accuracy ±1.0% of full scale
Latency 16 scan cycles maximum
Diagnostic Testing: Optionally outputs may be slightly disturbed once in every 2
seconds to test for failure conditions. The output is frozen
and adjusted by the Diagnostic Test Deviation. The PGM
read back is frozen during the test at the last reading. If the
change from the last output is greater than ½ test deviation,
the output is not modified.
Diagnostic Test Deviation: 0.015 milli-amps for one scan cycle
Power Requirements:
+5 VDC 300 mA
+24 (±10%) VDC 675 mA (from RTP backplane external voltage)
3122:
Output Signal Range: 0 to +10 V Voltage Outputs
–10 to +10 V Voltage Outputs
Output Impedance: Greater than 10 Mwhen outputs turned off
Less than 1.15 when outputs turned on
Full Scale Value: 10 V
Analog output error:
Maximum error at 25 °C: ±0.0525% of Full Scale Value (±5.25 mV)
Temperature Coefficient: ±0.0065% of Full Scale Value/ ºC (±0.65 mV/ ºC)
Maximum error (-20 to 60 °C):±0.2475% of Full Scale Value (±24.75 mV)
Note: Accuracy measured using 5-foot cable and 4.75KΩ load
Note: To insure the stated Analog I/O specifications, you need five minutes of warm-up time in a
stable temperature environment.
Value of LSB: 317 V
Settling Time: Less than 130 s for full range change
Typical Slew Rate: 0.1 V/s (resistive load)
Load Resistance: 2000 minimum reference to Signal Return
Maximum Capacitive Load: 10 µF
Crosstalk between Channels: -72 dB at DC, AC (50 Hz & 60)
Non-Linearity: ±0.065% of Full Scale Value
Repeatability: ±0.065% of Full Scale Voltage Value at fixed temperature

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Readback:
Accuracy ±1.0% of full scale
Latency 10.8 msec
Diagnostic Testing: Optionally outputs may be slightly disturbed once in every 2
seconds to test for failure conditions. The output is frozen
and adjusted by the Diagnostic Test Deviation. The PGM
read back is frozen during the test at the last reading. If the
change from the last output is greater than ½ test deviation,
the output is not modified.
Diagnostic Test Deviation: 0.010 Volts for one scan cycle.
Power Requirements:
+5 VDC 300 mA
+24 (±10%) VDC 500 mA (from RTP backplane external voltage)
Termination Module Connectors: 37 pin D-Sub connector for use with the 3056/00 Digital
Cables. These cables have a diameter of 0.5 inches (1.27
centimeters) with a minimum bend radius of 4.6 inches
(11.69 centimeters).
Termination Module: 3099/22-100 Single Termination Module
3099/22-000 Triple Redundant Termination Module
Effect of Incorrect Field Wiring: Outputs can be shorted to ground indefinitely. Connections
may be left open indefinitely. Reversed terminal connections
results in reversed polarity output applied to load. Readback
of outputs will annunciate these errors.
Termination Module Dimensions: All Termination Modules are 4.38 inches (11.1 centimeters)
in height and have 3.75 inches (9.5 centimeters) of depth.
The width for each termination module and the compatible
field wiring size is tabulated as following:
Model #
Description
Width
(")
Width
(cm)
Minimum
AWG
Maximum
AWG
3099/22-000
SIL-3 Triple Termination Module - 16 channel isolated
analog output
4.37
11.1
28
16
3099/22-100
SIL-3 Single Termination Module - 16 channel isolated
analog output
3.64
9.2
28
16
Module dimension values are ± 0.05 inches or ± 0.127 centimeters!

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Failure Rates in Accordance to IEC 61508
The following table summarizes the failure rates of the modules, which were calculated from
Failure Mode and Diagnostic Effects in accordance to standard IEC 61508. The information can
be used in calculating probability of dangerous failures using Reliability Block Modeling or Markov
Modeling. Such modeling should consider redundant 3121 or 3122 analog output modules in a
2oo2 or 3oo3 configuration.
Model:
3121
3122
Safety Integrity Level:
3
3
Safe Failure Fraction:
99.64%
99.63%
Diagnostic Coverage:
99.46%
99.46%
Failure Rates In Common Circuitry:
Safe Detected
2.5292E-07
2.5292E-07
Safe Undetected
4.5548E-09
4.5548E-09
Dangerous Detected
4.5802E-07
4.5802E-07
Dangerous Undetected
2.5120E-09
2.5120E-09
Don't Care
3.5875E-07
3.5875E-07
Failure Rates In Per Channel Circuitry:
Safe Detected
0.0000E+00
1.7820E-09
Safe Undetected
1.1250E-08
1.8000E-11
Dangerous Detected
9.6077E-08
1.1333E-07
Dangerous Undetected
4.7275E-10
5.6950E-10
Don't Care
3.5200E-08
7.1300E-08
Average Frequency of a Dangerous Failure per Hour (1oo1):
2.9848E-09
3.0815E-09
Average Frequency of a Dangerous Failure per Hour (2oo2):
5.9695E-09
6.1630E-09
Average Frequency of a Dangerous Failure per Hour (3oo3):
8.9543E-09
9.2445E-09
Mean Time to Restoration:
No restriction

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Cabling
Adhere to the specified insulation strip length of 0.26 inches (6.5 mm) when you connect field
wiring to the terminal modules; excessive insulation strip lengths can cause an electrical hazard.
Do not exceed the specified torque when you secure the wires into the terminal module;
maximum torque is 2.2 inch-pounds (0.25 N-m).
Standard cables to termination modules are minimum 5 feet in length.
You must disable (offline) an I/O card before you can hot-swap it. After you replace an I/O card,
you must enable it to return it to operation. It must be also disabled (offline), if making online
changes and removing it from a redundant configuration. While NetArrays is operating in Debug
mode, use the I/O Configuration Form to disable or enable I/O cards. To hot swap an I/O card,
first display the card’s icon in the I/O Configuration Form. If the I/O card’s icon is red, you can
remove it. If the I/O card’s icon is yellow or green, select the icon and disable it before you
remove the card. After you replace the I/O card, select the card’s icon and re-enable it. The
color of the icon changes to green to indicate the card is online.
Warning! Never remove the card from the chassis with the termination cables
connected and the field power applied. Always disconnect the field power and cables
before removing the card from the chassis. Always insert the card into the chassis with
the cables and field power disconnected.
Pin
Signal
1 Top
Channel 0+
1 Middle
Channel 0-
1 Bottom
Channel 0 Shield
2 Top
Channel 1+
2 Middle
Channel 1-
2 Bottom
Channel 1 Shield
3 Top
Channel 2+
3 Middle
Channel 2-
3 Bottom
Channel 2 Shield
4 Top
Channel 3+
4 Middle
Channel 3-
4 Bottom
Channel 3 Shield
5 Top
Channel 4+
5 Middle
Channel 4-
5 Bottom
Channel 4 Shield
6 Top
Channel 5+
6 Middle
Channel 5-
6 Bottom
Channel 5 Shield
7 Top
Channel 6+
7 Middle
Channel 6-
7 Bottom
Channel 6 Shield
8 Top
Channel 7+
8 Middle
Channel 7-
Load
Ground
Load

10
8 Bottom
Channel 7 Shield
9 Top
Channel 8+
9 Middle
Channel 8-
9 Bottom
Channel 8 Shield
10 Top
Channel 9+
10 Middle
Channel 9-
10 Bottom
Channel 9 Shield
11 Top
Channel 10+
11 Middle
Channel 10-
11 Bottom
Channel 10 Shield
12 Top
Channel 11+
12 Middle
Channel 11-
12 Bottom
Channel 11 Shield
13 Top
Channel 12+
13 Middle
Channel 12-
13 Bottom
Channel 12 Shield
14 Top
Channel 13+
14 Middle
Channel 13-
14 Bottom
Channel 13 Shield
15 Top
Channel 14+
15 Middle
Channel 14-
15 Bottom
Channel 14 Shield
16 Top
Channel 15+
16 Middle
Channel 15-
16 Bottom
Channel 15 Shield
Figure 1: Field connections on the 3099/22-X00 Termination Module (Revision A).