RTP 3121 User manual

Technical Manual
3121 and 3122
16-Channel
Analog Output Cards

2
© 2002 - 2019 RTP Corporation
Specifications, information and graphics are subject to change without notice. Contact
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

3
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

4
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.

5
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)

6
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

7
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!

8
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

9
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).

11
Pin
Signal
TB1 Pin 1
Channel 0+
TB1 Pin 2
Channel 0-
TB1 Pin 3
Channel 0 Shield
TB1 Pin 4
Channel 1+
TB1 Pin 5
Channel 1-
TB1 Pin 6
Channel 1 Shield
TB1 Pin 7
Channel 2+
TB1 Pin 8
Channel 2-
TB1 Pin 9
Channel 2 Shield
TB1 Pin 10
Channel 3+
TB1 Pin 11
Channel 3-
TB1 Pin 12
Channel 3 Shield
TB1 Pin 13
Channel 4+
TB1 Pin 14
Channel 4-
TB1 Pin 15
Channel 4 Shield
TB1 Pin 16
Channel 5+
TB1 Pin 17
Channel 5-
TB1 Pin 18
Channel 5 Shield
TB2 Pin 1
Channel 6+
TB2 Pin 2
Channel 6-
TB2 Pin 3
Channel 6 Shield
TB2 Pin 4
Channel 7+
TB2 Pin 5
Channel 7-
TB2 Pin 6
Channel 7 Shield
TB2 Pin 7
Channel 8+
TB2 Pin 8
Channel 8-
TB2 Pin 9
Channel 8 Shield
TB2 Pin 10
Channel 9+
TB2 Pin 11
Channel 9-
TB2 Pin 12
Channel 9 Shield
TB2 Pin 13
Channel 10+
TB2 Pin 14
Channel 10-
TB2 Pin 15
Channel 10 Shield
TB2 Pin 16
Channel 11+
TB2 Pin 17
Channel 11-
TB2 Pin 18
Channel 11 Shield
TB3 Pin 1
Channel 12+
TB3 Pin 2
Channel 12-
TB3 Pin 3
Channel 12 Shield
TB3 Pin 4
Channel 13+
TB3 Pin 5
Channel 13-
TB3 Pin 6
Channel 13 Shield
TB3 Pin 7
Channel 14+
TB3 Pin 8
Channel 14-
TB3 Pin 9
Channel 14 Shield
TB3 Pin 10
Channel 15+
Load
Ground
Load

12
TB3 Pin 11
Channel 15-
TB3 Pin 12
Channel 15 Shield
TB3 Pin 13
No Connection
TB3 Pin 14
No Connection
TB3 Pin 15
No Connection
TB3 Pin 16
No Connection
TB3 Pin 17
No Connection
TB3 Pin 18
No Connection
Figure 2: Field connections on the 3099/22-X00 Termination Module (Revision B and later).

13
USER INTERFACE CONNECTION
WIRE COLOR
37-PIN
CONNECTOR
PIN
SIGNAL
Black
1
DGND
White
20
N/C
Red
2
N/C
Green
21
N/C
Orange
3
N/C
Blue
22
N/C
White/Black
4
N/C
Red/Black
23
N/C
Green/Black
5
AGND
Orange/Black
24
N/C
Blue/Black
6
OUT 15
Black/White
25
OUT 14
Red/White
7
AGND
Green/White
26
OUT13
Blue/White
8
OUT 12
Black/Red
27
AGND
White/Red
9
OUT 11
Orange/Red
28
OUT 10
Blue/Red
10
AGND
Red/Green
29
OUT 9
Orange/Green
11
OUT 8
Black/White/Red
30
AGND
White/Black/Red
12
OUT 7
Red/Black/White
31
OUT 6
Green/Black/White
13
AGND
Blue/Black/White
32
OUT 5
Blue/Black/White
14
OUT 4
Black/Red/Green
33
AGND
White/Red/Green
15
OUT 3
Red/Black/Green
34
OUT 2
Green/Black/Orange
16
AGND
Orange/Black/Green
35
OUT 1
Blue/White/Orange
17
OUT 0
Black/White/Orange
36
AGND
White/Red/Orange
18
N/C
Orange/White/Blue
Case
**See Note
White/Red/Blue
19
Cable Presence
Figure 3: User Interface Connections for 3121 and 3122 Cards with 3055/FL cable.
NOTE: Cable detect is activated by connecting Pin 19 to Pin 1.
**Note: On the Flying lead end this wire is crimped and soldered to a ring terminal. On
Female end of the 3055/FL, this wire is soldered to the metalized hood.

14
Redundant I/O Cards Placement
3000 Series System with I/O Cards
Redundant I/O cards may be located in any chassis; there are no restrictions.
3100 Series System with I/O Cards
Redundant Output Cards in non-safety 3100 systems have the following chassis placement
restrictions if the Output_Disable_Type field is equal to 1 in the Node Configuration file.
All Redundant Output Cards may be located in the same chassis or in a single
other redundant chassis.
There can be multiple pairs of redundant chassis, but all redundant I/O cards
must stay within the same chassis pair as the other cards in the chassis pair.
This is an example of a good redundant configuration. All Redundant I/O cards are within two
chassis only:
Rack0 Slot0 is redundant with Rack0 Slot1 (OK-Redundant cards in same Rack)
Rack0 Slot2 is redundant with Rack1 Slot5 (OK-Redundant cards in one Rack and second Rack)
Rack0 Slot3 is redundant with Rack1 Slot10 (OK-Redundant cards in one Rack and second Rack)
This is an example of a bad redundant configuration. The redundant cards are distributed over
three chassis:
Rack0 Slot0 is redundant with Rack0 Slot1 (OK-Redundant cards in same Rack)
Rack0 Slot2 is redundant with Rack1 Slot5 (OK-Redundant cards in one Rack and second Rack)
Rack0 Slot3 is redundant with Rack2 Slot5 (Not OK-Redundant cards in one Rack and third Rack)
3200 Series System with I/O Cards (3121 only)
Redundant I/O cards may be located in any chassis; there are no restrictions.

15
Software Configuration
PLD Upgrade
To update card’s PLD firmware follow this procedure:
1. Turn the power ON at all chassis within the target node.
2. From Windows StartPrograms menu, launch the RTP Netsuite/RTPNC utility.
3. Select the Node with the I/O cards to be updated.
4. Select FILE/Download File and navigate to the Program pldprog.pgm. Use the FILE
TYPE/pgm option. CLICK/OPEN button to initiate downloading the file. When prompted
for PASSWORD enter “rtp” (or the correct node password).
5. Select FILE/Download File and Select CID_0097.PLD for the 3121 or CID_0096.PLD
for the 3122.Use the FILE TYPE/pld option. CLICK/OPEN button to initiate
downloading the file. When prompted for PASSWORD enter “rtp” (or the correct node
password).
6. In RTP NetArrays Select Status for the Node, and observe that the pldprog.pgm file
and the CID_0097.PLD for the 3121 or CID_0096.PLD for the 3122 file were received as
shown in Status Window 1.
7. Turn the power OFF and then back ON at all chassis within the target node.
8. The program pldprog.pgm downloaded will start and automatically update all of the
applicable cards’ PLDs. All non-distributed I/O cards should have their status LEDs ON.
9. In NetArrays Select Status for the Node, observe that the update has started as shown
in Status Window 1.
10. The Status Window will show all cards marked to be updated. Ensure that all applicable
cards in the Node are identified for updating.
11. Depending on the speed of the node, it will take several minutes for the process to
complete. When finished, the Status Window will show as shown in Status Window 2.
12. The cards being updated are processed at different times. Ensure that all cards identified
for updating have been processed before proceeding.
13. It is possible that cards of a type not being updated will report an error. This is of no
concern.
14. After the PLD update process is complete, all applicable cards in the Node will have their
PLDs updated.
15. Turn the power OFF and then back ON at all chassis within the target node. After the
power cycle, the 2files downloaded will automatically be deleted, and the normal node
program will be active. The cards’ Integer Card Revision variables will show the revision
of the PLD downloaded.

16
Status Window 1
Status Window 2

17
NetArrays Configuration
Each output point is controlled by a Floating-point Variable object with the corresponding Tag. A
Floating-point readback can be read to compare the actual output from the card. NetArrays also
returns an error detection status word for the card. This card includes a Watchdog Timer, which
can disable the outputs if the processor fails to access the card within the allotted time.
NOTE: Properties for the 3121 and 3122 cards are the same

18
Card Properties
Redundant Card ID
If the outputs of two or three of these cards are connected in a parallel redundant output
configuration, a unique Redundant Card ID must be assigned to the cards to identify them as
being part of the same parallel redundant group. Analog output cards are considered to be
connected in a parallel redundant output configuration if a single output device is connected to
channel 0 of each card, another output device is connected to channel 1 of each card, and so on
for every configured channel on the cards. Assigning them to a redundant group determines how
the diagnostic tests are performed and if a card is taken offline.
The Redundant Card ID number assigned to one group must not be assigned to any other group
of parallel redundant cards. If the analog card's outputs are not connected in a parallel redundant
configuration, the Redundant Card ID must be 0.
Watchdog Timer
When enabled, the Watchdog Timer will disable the outputs if the card is not accessed by the
controller within 150 ms. When disabled, the Watchdog Timer has no effect on the card's
operation. For safety-critical applications, this variable must be enabled.
Bool Disable Testing
The Disable Testing output is an Boolean Variable that can be used to disable testing function of
the card. NetArrays assigns a Tag to this property when the card is added to the I/O
configuration. Reconfigure the Tag as required to match the Module Form Boolean Variable
object that is used to monitor and control the card’s Disable Testing output. When the value of
the variable is True, fault testing function of the card is disabled. This variable is connected with
PST object Test Running Status Output. This is used when the 3018 HART card is wired in
parallel to the output card and to prevent interference to the HART communications.
Integer Error Detection
The Error Detection input is an Int Variable that can be used to detect an I/O card failure.
NetArrays assigns a default Tag to this variable when the card is added to the I/O configuration.
A Card Timeout Error (Bit 0) will set the Error Latch bit (Bit14), which will remain set until this bit is
cleared to zero by an operator. While the Error Latch is set, the card will be offline and the target
node will not attempt to communicate with it. Note that most cards do not use all the status bits
shown. Any unused bits will always equal zero.
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
ERR
LTCH
FAULT
ERR
DATA
ERR
DATA
INV
CARD
ID
CARD
ERR
CBL
ERR
LOOP
BACK
CH
FAIL
TIME
OUT
Bit 14 Card Error Latch
This status bit indicates that a Card Timeout Error occurred on the I/O card, and that it
has been taken offline. The card will not be initialized or placed online until this bit is
cleared in the project program or operator intervention.
If this bit is set, it must be cleared to return the card to operation. The correct way to
clear this bit is to select the card’s icon in the I/O configuration Form while NetArrays is
operating in Debug mode and answer “Yes” to the prompt. See I/O Card Status and
Control. (It is also possible to change the value of this variable by forcing an Integer Bit
Variable object, with Bit 14 selected in the object's properties, to zero. Do not clear the
entire Error Detection Integer Variable to zero.)

19
Bit 10 Fault Test Error
This status bit indicates that the 3121/3122 analog output card’s safety switch has failed.
Bit 9 Backplane Bus Data Error
This status bit is applicable only to I/O cards with Backplane Bus data checking
capability. It indicates that a data error was detected in a data or command transfer to or
from an I/O card.
Bit 8 Data Invalid
This status bit indicates that the I/O card is not ready to send valid data.
Bit 7 Card ID Does Not Match I/O Configuration
This bit indicates that the ID code read from the I/O card does not match the card type
specified in the NetArrays I/O configuration.
Bit 6 Card Error
This bit indicates that a hardware timeout is reported by PLD.
Bit 5 Cable Detect Error
This bit indicates that one or more of the cables are not connected to the I/O card or
between the I/O card and the termination block.
Bit 4 Loopback Error
This bit indicates that the card has failed a loopback test. The actual output from the card
does not equal the expected output.
Bit 1 Channel Failure
This bit indicates that the card has a failure on one or more of its channels. Examine the
channel error status variable to determine the failed channel.
Bit 0 Card Timeout Error
This bit indicates that there was no response from the I/O card. The card is not returning
a ready test signal, is offline, or has been removed from the chassis. This bit sets the
Card Error Latch (Bit 14).
Integer Channel Error Status
The bits of this Int input represent the last analog output states written to the card. A 1 indicates
that the channel has readback or fault error. NetArrays assigns a default Tag to this variable
when the card is added to the I/O configuration.
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
Chan
15
Chan
14
Chan
13
Chan
12
Chan
11
Chan
10
Chan
9
Chan
8
Chan
7
Chan
6
Chan
5
Chan
4
Chan
3
Chan
2
Chan
1
Chan
0
Integer Card Revision
The card revision is an integer value, which equals to the revision number of the PLD code.
NetArrays assigns a default Tag to this variable when the card is added to the I/O configuration.
Reassign this Tag as required to access this card revision in the project program.
Integer Cal Date
This is an encoded date when the card was calibrated in the format YYDDD where YY is
the last 2 digits of the year and DDD is the day within the year.
Integer Cal Serial Number
This is a serial number recorded when the card was calibrated.

20
Float Temperature Input
The Board Temp is a floating-point value, which equals to the operating temperature in Degrees
Celsius as measured by an on-board sensor. User applications can implement customized limits
for alarms and annunciations by examining the value of this variable. NetArrays assigns a default
Tag to this variable when the card is added to the I/O configuration. Reassign this Tag as
required to access this board temperature in the project program.
I/O Channel Properties
Channel
Each channel may be configured as a Float output or Disabled. For the 3121 (current) card, this
value represents the output current in mA. For the 3122 (voltage) card, this value represents the
output voltage in V. For example, if the 3121 card is used, a value of “10” should generate a 10
mA output in current mode. The value is converted to the integer raw count for you and applied
to the D/A to generate the appropriate output. The Type selection specifies the outputs high and
low limits, so even if the value is greater than the maximum output or less than the minimum
output, the output will be appropriately limited. Example: If the type is set to 4 –20 mA, a zero
value will still generate a 4 mA output.
If "Disabled" is selected, the channel is disabled and the output will be zero. You can disable any
unused channel to avoid scanning unconnected outputs, and to free up the Tag assigned to the
channel
I/O Tag
Each Float channel is controlled by a Float Variable object. NetArrays assigns a Tag to each
channel when the card is added to the I/O configuration.
Note! All unused un-terminated I/O points must be disabled in IO Configuration.
Readback Tag
The Readback Tag column specifies the Tag assigned to the readback input of the channel. The
Readback input can be enabled or disabled by checking or un-checking the box in this column. If
the channel is Disabled, this column entry is disabled. NetArrays assigns a default Tag to this
variable when the card is added to the I/O configuration.
Type
For the 3121 (current) card, select a type of current 4-20mA, current +/-20mA or current 0-20mA
as required. For the 3122 (voltage) card, select a type of voltage 0-10V, or voltage +/-10V.
Comment
Enter up to 255 characters for comments associated with the corresponding tag. The comments
are informational only and are not required by any RTP NetSuite application.
Default (3100/Non safety system only)
Note! This property is available only if output card is used in non safety 3100 Node.
Specifies channel behavior when chassis to node communication is lost:
On - the output will be equal to the value configured in "Default On" property
Off - the output will be off
Freeze - output value will be frozen at last value