10ACC-4 - Electronic meter Daytronic - Free user manual and instructions

Product Type	4-Channel Counter/Timer Card
Channels	4 independent counter channels
Input Type	TTL-level (+5 V DC max), contact closure (active low)
Full-Scale Count Ranges	32,767 (1 increment), 327,670 (10 increments), 3,276,700 (100 increments)
Debounce Time	0.06 to 30 ms, selectable via DIP switches
Auxiliary Power Input	9-15 V DC (optional, for count retention during system power-down)
I/O Connector	20-pin connector, mates with Daytronic CONDITIONER CONNECTOR No. 60322
Control Commands	COH, COU, COR, COC (Hold, Update, Reset, Clear) per channel
External Logic Control	Yes, via dedicated I/O pins for Hold, Reset, etc.
Default Range	32,767 counts (until RNG command is applied)
Initial Mode at Power-Up	All channels in COUNT HOLD mode; COU command required for normal operation
Type Configuration	Factory-set as "C2" (Counter/Timer mode); TYP command not required
Location/Reconfiguration	LOCATE (LCT) command needed only if reconfiguring or installing card
Operating Environment	System power shut-down; auxiliary power keeps counts alive
Dimensions	Standard Daytronic card form factor (exact dimensions not specified)
Weight	Not specified; lightweight PCB
Manual Pages	5 pages (PDF)

Frequently Asked Questions - 10ACC-4 Daytronic

What is the Daytronic 10ACC-4 used for?

The 10ACC-4 is a 4-channel counter/totalizer card that accepts TTL-level or contact closure inputs, counts events, and provides a rolled-up count value. It is typically used in data acquisition systems for counting pulses or tallying events.

How do I connect the 10ACC-4 to my system?

The card uses a 20-pin I/O connector that mates with Daytronic CONDITIONER CONNECTOR No. 60322. Inputs are assigned to pins 1,3,5,7 (channels 1-4) and their commons; other pins provide Hold, Reset, and auxiliary power. Refer to Table 3.A.1.8 in the manual for full pin assignments.

How do I set the debounce time on the 10ACC-4?

Debounce time is set via a DIP-switch block on the card. Turn off power, remove the card, and set the switches according to Table 3.A.1.10. Possible times range from 0.06 ms to 30 ms. For example, all switches OFF gives 0.06 ms; all ON gives 30 ms.

What power supply does the 10ACC-4 require?

The card uses the system backplane power but also has an auxiliary external power input (9-15 V DC) to keep counts alive during a system power-down. Connect auxiliary power to pins 10 (+) and L (-) of the I/O connector.

How do I change the full-scale count range for a channel?

Use the RNG command in the form RNG x = n [CR], where x is the channel (1-4) and n is 1 (32,767 counts), 2 (327,670 counts), or 3 (3,276,700 counts). Default is 32,767 counts.

Why is my counter not counting after power-up?

All channels power up in COUNT HOLD mode. You must issue a COU x [CR] command (or apply a Logic 1 to the Hold pin) to update and resume counting for each channel.

Can I control the 10ACC-4 externally?

Yes, via the I/O connector pins. For example, applying Logic 0 to the Hold pin holds the count; Logic 0 to the Reset pin resets it. These can be ORed with software commands (COH, COR, etc.).

What is the difference between COH, COU, COR, and COC commands?

COH (Count Hold) freezes the displayed count; COU (Count Update) releases hold and updates the display; COR (Count Reset) sets the count to zero; COC (Count Clear) releases the reset, resuming counting from zero. Each applies to a specific channel.

Does the 10ACC-4 require configuration before use?

It is pre-configured as type C2 (counter mode), so no TYPE command is needed. You may need to set the range (RNG) and debounce time, and if installing the card yourself, use the LOCATE (LCT) command.

How do I increment the count manually?

Use the INC command in the form INC x [CR]. This increases the count for channel x by one increment (1, 10, or 100, depending on the selected range).

USER MANUAL 10ACC-4 Daytronic

1. 10ACC-4 CONNECTIONS

The Model 10ACC-4's 20-pin I/O CONNECTOR mates with Daytronic CONDITIONER CONNECTOR No. 60322 (shown in Fig. 1.E.1). Pin functions are given in Table 3.A.1.8, below. Cabling is given in the following figure. Each of the 10ACC-4's independent channels may be connected to either a TTL driver or contact switch.

Concerning 10ACC-4 pin connections, you should note that

a. All inputs are TTL-level (+5 V-DC maximum). Contact closures are negative true to ground (active low logic), so that a Logic 0 at Pin 1, 3, 5, or 7 causes the "clocking" of one count for Channel 1, 2, 3, or 4, respectively.
b. You may select a debounce time from 0.06 through 30 milliseconds for all four inputs (see Section d.2(b) for the procedure).
c. Like the 10ACT01, the Model 10ACC-4 provides for the application and release of "COUNT HOLD" and "COUNT RESET" by appropriate negative-true logic inputs at the I/O CONNECTOR—as well as by the entry of MNEMONIC COMMANDS (see Section d.4, below). For full details on "External Logic Specifications and Interconnections," see Appendix F of this Guidebook.
d. Unlike the 10ACT01, the Model 10ACC-4 has input provisions for a user-supplied auxiliary external power supply from 9 to 15 V-DC, which would allow you to keep each channel's count "alive" during system power shut-down (see Fig. 3.A.1.4, below).

Fig. 3.A.1.4 Model 10ACC-4 Cabling

graph TD
    A["TTL SOURCE"] -->|COMMON (RETURN)| B["9-15 VDC Auxiliary Power Supply"]
    B --> C["SHIELD"]
    C --> D["CLOCK"]
    D --> E["CONNECTOR CONNECTOR (No. 60322)"]
    E --> F["Ground Lug"]
    F --> G["Connector pins shown as viewed from rear(cable) side of connector."]
    style A fill:#f9f,stroke:#333
    style B fill:#ccf,stroke:#333
    style C fill:#cfc,stroke:#333
    style D fill:#fcc,stroke:#333
    style E fill:#cff,stroke:#333
    style F fill:#ffc,stroke:#333
    style G fill:#fcc,stroke:#333

NOTE: Upon system powerup, ALL 10ACC-4 CHANNELS COME UP IN THE "COUNT HOLD" MODE. In order for them to perform properly, you must issue a COUNTER UPDATE (COU) command to each channel by entering a command of COU x [CR] or by applying a Logic 1 to the appropriate pin of the rear I/O CONNECTOR.

3.A.1 Counter/Timer Functions

Table 3.A.1.8
Model 10ACC-4 Pin Assignments

I/O CONNECTOR Pin No.	10ACC-4 Channel No.	Line Function
1	1
A	1	COMMON
2	1
B	1	HOLD
3	2
C	2	COMMON
4	2
D	2	HOLD
5	3
E	3	COMMON
6	3
F	3	HOLD
7	4
H	4	COMMON
8	4
J	4	HOLD
9,K		N/C
10	+ 9-15 V-DC AUXILIARY EXTERNAL POWER INPUT
L	- 9-15 V-DC AUXILIARY EXTERNAL POWER INPUT

N/C = Not Committed.

2. 10ACC-4 CONFIGURATION

a. SETTING RANGE AND RESOLUTION: RNG COMMAND

NOTE: Prior to shipment, each 10ACC-4 channel will have been assigned a TYPE designation of "C2" (this is the code assigned to the 10ACT01's channel in "COUNTER" ("TOTALIZER") mode, as explained in Section b.2(a), above). THEREFORE, YOU NEED NOT APPLY THE TYPE (TYP) COMMAND WHEN CONFIGURING THE 10ACC-4. Also, you will normally NOT have to "locate" the 10ACC-4's DATA CHANNELS via the LOCATE (LCT) command, unless you are "reconfiguring" them or are installing the 10ACC-4 card yourself—in which case see Appendix C.

Note too that the SENSITIVITY (SEN) command (Section b.2(c), above) does not apply to the Model 10ACC-4.

Each of the 10ACC-4's channels may be independently set for an appropriate full-scale count (with corresponding count increment) by entering, for that channel, a RANGE (RNG) command of the form

$$ \mathbf {R N G} \mathbf {x} = \mathbf {n} [ \mathbf {C R} ] ^ {*} $$

where "x" is the number of the channel being set, and "n" is "1," "2," or "3," as given in the following table:

Table 3.A.1.9.
10ACC-4 Ranges

Full-Scale Count	Count Increment	"n" Value
32767	1	1
327670	10	2
3276700	100	3

Until the first application of the RNG command, a "default" range of 32767 will be in effect.

b. SETTING "DEBOUNCE" TIME

You can apply the same trigger delay (from 60 microseconds to 30 milliseconds) to all four of the 10ACC-4's input lines. This provides time for the bouncing of switch contacts to subside.

To set a "debounce" time for all four inputs:

1. Make sure the EEPROM Switch is OFF, and then turn OFF DataPAC power.
2. Remove the 10ACC-4 Card from its SLOT (see Appendix B for "Card Insertion and Removal").
3. Locate the DIP-switch block on the 10ACC-4 board. The switches are shown in Fig. 3.A.1.5, below.

Fig. 3.A.1.5. Model 10ACC-4 Debounce Switches

1. Referring to the following table, position the switches for the desired debounce time.

Table 3.A.1.10
Model 10ACC-4 Debounce Settings

Debounce Time (milliseconds)	Switch Settings
0.06	All Switches OFF ("OPEN")
1.5	Only Switch No. 1 ON ("CLOSED")
3.0	Only Switch No. 2 ON
4.5	Only Switch Nos. 1 and 2 ON
6.0	Only Switch No. 3 ON
7.5	Only Switch Nos. 1 and 3 ON
9.0	Only Switch Nos. 2 and 3 ON
10.5	Only Switch Nos. 1, 2, and 3 ON
15.0	Only Switch No. 4 ON
16.5	Only Switch Nos. 1 and 4 ON
18.0	Only Switch Nos. 2 and 4 ON
19.5	Only Switch Nos. 1, 2, and 4 ON
21.0	Only Switch Nos. 3 and 4 ON
22.5	Only Switch Nos. 1, 3, and 4 ON
28.5	Only Switch Nos. 2, 3, and 4 ON
30.0	All Switches ON

3. INCREMENTING THE COUNT: INC COMMAND

An INCREMENT (INC) command of the form

$$ \mathrm{INC} \times [ \mathrm{CR} ] $$

may be applied to any one of the 10ACC-4's channels (No. x) to increase its count reading by one increment (1, 10, or 100, depending on the full-scale count selected for that channel via the RANGE (RNG) command, above).

4. COUNTER CONTROL: COH, COU, COR, AND COC COMMANDS

These four commands are discussed in Section c.2, above, with reference to the Model 10ACT01 Counter/Timer Card in "COUNTER" or "TIMER" mode. Each command may also be used with the Model 10ACC-4, but is here applied individually to only one of the card's four counter channels.

NOTE THAT EACH COMMAND AFFECTS ONLY THE SCANNED DATA READING OF THE CHANNEL TO WHICH IT IS APPLIED (IN MOST CASES, THIS WILL BE A DISPLAYED VALUE). EACH 10ACC-4 CHANNEL WILL ALWAYS CONTINUE TO ACCUMULATE COUNTS, REGARDLESS OF THE "CONTROL" COMMAND PRESENTLY IN EFFECT FOR THAT CHANNEL, AND OF THE DISPLAYED READING THAT RESULTS FROM THE APPLICATION OF THAT COMMAND.

As with the Model 10ACT01, the effects of the four "COUNT CONTROL" commands can also be obtained by the application of appropriate logic inputs to the 10ACC-4's rear I/O CONNECTOR. Thus,

a. TO HOLD THE COUNT VALUE for a 10ACC-4's Channel No. x, you may apply a command of

$$ \mathrm{COH} \times [ \mathrm{CR} ] $$

Alternatively, a Logic 0 at Pin B, D, F, or J of the 10ACC-4's rear I/O CONNECTOR will "hold" the existing scanned data reading for the corresponding channel, and may be "ORed" with a COUNTER HOLD (COH) command.

b. TO UPDATE THE COUNT VALUE for a 10ACC-4's Channel No. x, you may apply a command of

COU x [CR]

Alternatively, a Logic 1 at Pin B, D, F, or J of the 10ACC-4's rear I/O CONNECTOR will release an existing "hold" condition for the corresponding channel, instantly updating that channel's display and resuming its normal counting operation. Such an input may be "ORed" with a COUNTER UPDATE (COU) command.

C. TO RESET THE COUNT for a 10ACC-4's "unheld" Channel No. x, you may apply a command of

COR x [CR]

Alternatively, a Logic 0 at Pin 2, 4, 6, or 8 of the 10ACC-4's rear I/O CONNECTOR will set and hold at zero the scanned data reading for the corresponding channel, if no COUNTER HOLD (COH) is in effect for the channel, and if the channel's "HOLD" pin is at Logic 1. Such an input may be "ORed" with a COUNTER RESET (COR) command.

d. TO CLEAR THE COUNT for a 10ACC-4's "unheld" Channel No. x, you may apply a command of

COC x [CR]

Alternatively, a Logic 1 at Pin 2, 4, 6, or 8 of the 10ACC-4's rear I/O CONNECTOR will release an existing "reset" condition for the corresponding channel, causing it to resume normal updating (from zero), if no COUNTER HOLD (COH) is in effect for the channel, and if the channel's "HOLD" pin is at Logic 1. Such an input may be "ORed" with a COUNTER CLEAR (COC) command.