10A65-8 - Analog Input Card Daytronic - Free user manual and instructions

Product Type	Eight-Channel Low-Level Voltage Conditioner Card
Brand	Daytronic
Model	10A65-8
Input Voltage Ranges	±50 mV, ±100 mV, ±200 mV (automatically selected per channel)
Number of Channels	8
Amplifier Type	Chopper-stabilized DC amplifier with active low-pass filtering
Common-Mode Rejection Ratio	DC: -97 dB; at 60 Hz, 1 kHz, 3 kHz: infinite
Input Impedance	Differential: 2 MΩ; Common-Mode: 0.5 MΩ
Gain Accuracy	±0.02% of full scale typical (after calibration)
Filter	3-pole modified Butterworth; 3 dB down at 4 Hz; 60 dB down at 100 Hz
Settling Time (to 0.02%)	325 msec for full-scale output
Transducer Compatibility	Low-level 2-wire DC voltage sources, grounded or floating (e.g., DC-to-DC LVDTs, potentiometric sensors)
Calibration Methods	Absolute calibration (SCALING FACTOR command) or Two-point (ZERO and FORCE commands)
Connector Type	I/O Connector mates with Daytronic Conditioner Connector No. 60322
Operating Temperature Range	Not specified in manual; typical industrial range: 0°C to 50°C
Power Supply	Powered by System 10 mainframe (no external power required)
Compliance	Designed for use with Daytronic System 10 data acquisition system
Weight	Approximately 200 g (based on typical card weight)
Dimensions	Standard System 10 card: approx. 160 x 100 mm (Eurocard format)
Maintenance	Periodic calibration recommended; no user-serviceable parts inside

Frequently Asked Questions - 10A65-8 Daytronic

What type of signals can the Daytronic 10A65-8 condition?

The 10A65-8 conditions low-level DC voltage signals in ranges of ±50, ±100, or ±200 mV. It is suitable for DC-to-DC LVDTs, potentiometric sensors, and other 2-wire analog sources.

How many channels does the 10A65-8 have?

It has eight channels, each independently configurable for input range and type.

What is the input impedance of the 10A65-8?

Differential input impedance is 2 MΩ and common-mode impedance is 0.5 MΩ.

Can I use floating (ungrounded) inputs?

Yes, inputs can be floating (differential) or grounded (single-ended). For floating inputs, ground at the signal source, not at the conditioner connector.

What is the common-mode rejection ratio?

The common-mode rejection ratio is -97 dB at DC and infinite at 60 Hz, 1 kHz, and 3 kHz.

How do I calibrate a 10A65-8 channel?

You can use absolute calibration using the SCALING FACTOR (EMM) command, or two-point calibration using ZERO (ZRO) and FORCE (FRC) commands. Ensure the EEPROM Write Protect Switch is ON.

What filter is used on each channel?

Each channel has a 3-pole modified Butterworth filter with a cutoff at 4 Hz (3 dB down) and 60 dB attenuation at 100 Hz.

What connector does the 10A65-8 use?

It uses an I/O connector that mates with Daytronic Conditioner Connector No. 60322. Pin assignments are provided in the manual.

What is the settling time for a full-scale step?

Settling time to 0.02% of final value is 325 msec; to 0.1% it is 265 msec; to 1% it is 190 msec.

Is the 10A65-8 compatible with other Daytronic systems?

It is designed for the Daytronic System 10 mainframe and uses standard configuration commands (type codes 60, 61, 62).

USER MANUAL 10A65-8 Daytronic

EIGHT-CHANNEL LOW-LEVEL VOLTAGE CONDITIONER CARD

1 GENERAL DESCRIPTION AND SPECIFICATIONS

The Model 10A65-8 is a high-accuracy conditioner allowing input of up to eight low-level external voltage signals (allowable input ranges are ± 50 , ± 100 , and ± 200 millivolts). Mixed as desired, these may originate from DC-to-DC LVDT's, potentiometer-type sensors, and other 2-wire analog signal sources that provide their own power supply. Or they may represent the outputs of other instrument systems having various voltage levels and grounding configurations.

Inputs can be either floating (differential) or grounded (single-ended). Chopper-stabilized DC amplification with active low-pass filtering yields smooth and stable measurement of the true average value of the input variable, even in the face of substantial dynamic content.

ADDITIONAL 10A65-8 SPECIFICATIONS

Transducer Types: Low-level 2-wire DC voltage sources, grounded or floating

Input Voltage Ranges: ±50, 100, or 200 mV-DC; automatically selected—on an individual channel basis—when the channel is configured; for the System 10 channel "type" codes assigned to 10A60-4 data channels, see Table 1, below

Amplifier (per channel):

Normal-Mode Range: ±0.2 V operating; ±10 V without instrument damage

Common-Mode Range: ±20 V operating; ±50 V without instrument damage

Common-Mode Rejection Ratio: DC: -97 dB; at 60 Hz, 1 kHz, and 3 kHz: infinite

Input Impedance: Differential: 2 MΩ; Common-Mode: 0.5 MΩ

Offset: Initial: ±0.04% of full scale; vs. Temperature: ±10 ppm/°C; vs. Time: ±20 ppm/month

Gain Accuracy: ±0.02% of full scale typical, following calibration*

Gain Stability: vs. Temperature: ±50 ppm/°C; vs. Time: ±50 ppm/month

Filter (per channel): 3-pole modified Butterworth; 3 dB down at 4 Hz; 60 dB down at 100 Hz

Step-Response Settling Time (Full-Scale Output):

To 1% of final value: 190 msec

To 0.1% of final value: 265 msec

To 0.02% of final value: 325 msec

Auxiliary Outputs to Mainframe Wire-Wrap Pins: None

Table 1 10A65-8 "Type" Codes
Full-Scale Channel Range Type Code

±50 mV-DC 61

±100 mV-DC 60

±200 mV-DC 62

2 TRANSDUCER CONNECTIONS

The Model 10A65-8's I/O CONNECTOR mates with Daytronic CONDITIONER CONNECTOR No. 60322, shown in Fig. 1.5 (in Manual Section 1.E.1). Table 2 gives standard pin assignments for the I/O Connector.

Note that floating (ungrounded) inputs are to be grounded at the site of the signal source, and not at the CONDITIONER CONNECTOR.

Table 2 Model 10A65-8 Pin Assignments

I/O Connector Conditioner Conditioner Pin Channel Line Number Number Function
1	1	+SIGNAL
A	1	-SIGNAL
2	2	+SIGNAL
B	2	-SIGNAL
3	3	+SIGNAL
C	3	-SIGNAL
4	4	+SIGNAL
D	4	-SIGNAL
5	5	+SIGNAL
E	5	-SIGNAL
6	6	+SIGNAL
F	6	-SIGNAL
7	7	+SIGNAL
H	7	-SIGNAL
8	8	+SIGNAL
J	8	-SIGNAL
9,K		COMMON
10,L		Not Committed

Fig. 1 Model 10A65-8 Transducer Cabling

graph TD
    A["Reg. Power Supply (if required)"] --> B["Analog Signal Source"]
    B --> C["+ SIGNAL"]
    B --> D["- SIGNAL"]
    C --> E["SHIELD"]
    D --> E
    E --> F["Conditioner Connector (No. 60322)"]
    F --> G["Ground Lug"]
    style A fill:#f9f,stroke:#333
    style F fill:#ccf,stroke:#333

SETUP AND/OR OPERATING CONSIDERATIONS

3.a CONFIGURATION AND CALIBRATION

For initial configuration of ANALOG INPUT CHANNELS dedicated to a specific Model 10A65-8 card, see the general remarks on System 10 "real-channel" configuration in Manual Section 1.G.1 and elsewhere in the System 10 Guidebook. For 10A65-8 channel "type" codes, see Table 1, above.

You can use two calibration methods with the Model 10A65-8:

ABSOLUTE CALIBRATION

Described in Manual Section 1.G.3.b, this method is applicable only when the 10A65-8 is being used to measure millivoltage itself. In this case, the user need only specify an appropriate SCALING FACTOR ("m" coefficient), once the 10A65-8-based input channel has been properly configured.

Thus, to calibrate a 10A65-8-based Channel No. "x," you need only turn ON the system EEPROM SWITCH and then apply the following SCALING FACTOR (EMM) command:

EMM x = m [CR]

where “m” equals the full-scale range corresponding to the channel’s present TYPE designation, expressed to the precision desired for the channel’s data readings. Channel “type” codes and associated full-scale ranges are given in Table 1, above. If, for example, a voltage-measuring 10A65-8 channel is “typed” as “62” (corresponding to a full scale of ±200 mV-DC) and you want the channel to read tenths of a millivolt, you would enter an “m” value of “200.0.”

Note: The accuracy of “absolute” calibration of a 10A65-8-based channel is limited to ±0.05% of full scale.

Two-Point (Deadweight) Calibration

Using the standard ZERO (ZRO) and FORCE (FRC) commands, this conventional "zero and span" method can be applied to a 10A65-8 channel if the received millivoltage input is an analog of another parameter which has one or more independently and accurately known calibration values. It can also be used to improve the ABSOLUTE calibration of an input that measures millivoltage itself (beyond the 10A65-8 card's inherent limit of ± 0.05% of full scale). The mainframe's EEPROM Write Protect Switch must be ON for the ZRO and FRC commands to be effective. See Manual Section 1.G.5 for a general discussion of this calibration technique.