CIRCUTOR, SA reserves the right to modify features or the product manual without prior notifi cation. DISCLAIMER CIRCUTOR, SA reserves the right to make modifi cations to the device or the unit specifi ca- tions set out in this instruction manual without prior notice.
DHC-96 Aac REVISION LOG Table 1: Revision log� Date Revision Description 11/18 M226B01-03-18A Initial Version Change in the following sections: 01/19 M226B01-03-19A 6.1. - 7. - 10. SYMBOLS Table 2: Symbols� Symbol Description In compliance with the relevant European directive.
CIRCUTOR's after-sales service. 2�- PRODUCT DESCRIPTION The DHC-96 Aac is a device designed to measure and display the current and frequency AC single-phase. The device has 2 programmable current scales: 1 A and 5 A. The device features: - 4 keys that allow you to browse between the various screens and program the device.
The DHC-96 Aac device must be installed by authorised and qualified staff. The power supply plug must be disconnected and measuring systems switched off before handling, altering the connections or replacing the device.
DHC-96 Aac 3.2.- INSTALLATION Terminals, opening covers or removing elements can expose parts that are hazardous to the touch while the device is powered. Do not use the device until it is fully installed. The device should be installed inside an electric panel or enclosure, and panel-mounted.
Relay output Alimentación Auxiliar Power Supply Figure 4: Current measurement DHC-96 Aac� If the current being measured is higher than the nominal input current, 5A, a current transformer should be connected to the device. If more than one device is connected to the current transformer, it is necessary to connect them in series.
Display 00000 Keyboard Figure 5: Display DHC-96� 4.2.- KEYBOARD FUNCTIONS The DHC-96 Aac features 4 keys to display and configure the device, Figure 5 Table 5: Keyboard functions� Keystroke Previous screen In the configuration menu:...
Figure 6 activated depending on the value of the digital inputs (See “5.4.- RELAY OUTPUT 1” and “5.5.- RELAY OUTPUT 2”) 4.6.- DISPLAY The DHC-96 Aac features 4 display screens, Table 6 Table 6: Display menu� Display menu 5.000 Current...
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DHC-96 Aac Table 6 (Continuation) : Display menu� Display menu 50.00 Frequency Status of digital inputs: , status of the digital input 1: flashes when the input is activated , status of the digital input 2: flashes when the input is activated...
Con guration of the display Software version Figure 7: Configuration menu of the DHC-96 Aac� From any screen of the configuration menus, if no key is pressed for 4 minutes, the device leaves the configuration menu and returns to the display screen.
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DHC-96 Aac rEAd On the screen, press the , key to access the configuration menu in the display mode, i.e., the configuration parameters cannot be modified. rEAd On the screen, press the keys to access the configuration menu in the programming mode, i.e., the configuration parameters can be modified.
DHC-96 Aac 5.1.- CONFIGURATION OF THE INPUT , shows the main screen of the input configuration menu, from which the primary Figure 10 current and secondary current are configured. inPt Figure 10: Input configuration menu, main screen. Press the key to open the configuration menu.
DHC-96 Aac point. Use the to modify the decimal point. Minimum configuration value: 0. Maximum configuration value: 9999. To validate the data, press the key. Use the keys to browse the configuration screens of the menu. 5�1�2�- UNITS OF THE PRIMARY CURRENT This screen is used to configure the units of the primary current.
DHC-96 Aac 5�1�4�- UNITS OF THE SECONDARY CURRENT Note: This parameter cannot be modified. Unt.2 Use the keys to browse the configuration screens of the menu. 5�1�5�- SAVE CONFIGURATION To save the configuration of the device, press the key, until the main screen of the input...
DHC-96 Aac 5.2.- RS-485 COMMUNICATIONS , shows the main screen of the communications menu, where the parameters of the Figure 12 RS-485 communications are configured. Conn Figure 12: RS-485 communications menu, main screen� Press the key to open the configuration menu.
DHC-96 Aac 5�2�2�- BAUD RATE In this screen, the baud rate of RS-485 communications is selected. bAUd 9600 Use the ,key to browse the different options: 2400 , 9600 bps. 4800 , 9600 bps. 9600 , 9600 bps. 19.20 , 19200 bps.
DHC-96 Aac SAuE Use the ,key to browse the different options: , exit the configuration without saving the changed values. , save the changed configuration values. Press the key to validate the data and exit the configuration menu. 5.3.- ANALOG OUTPUT , shows the main screen of the analog output menu.
DHC-96 Aac Use the keys at the same time to configure the value. Use the ,key to browse the different options: 4-20 , Current output 4 ... 20 mA 0-20 , Current output 0 ... 20 mA 12.20, Current output 4 ...12 ... 20 mA To validate the data, press the key.
DHC-96 Aac To validate the data, press the key. Use the keys to browse the configuration screens of the menu. 5�3�4�- SAVE CONFIGURATION To save the configuration of the device, press the key, until the main screen of the input...
DHC-96 Aac 5.4.- RELAY OUTPUT 1 , shows the main screen of the configuration menu of relay output 1. Figure 16 do-1 Figure 16: Configuration menu of relay output 1, main screen. Press the key to open the setup menu.
DHC-96 Aac , relay output 1 is disabled. , remote control output. , alarm output. To validate the data, press the key. Use the keys to browse the configuration screens of the menu. 5�4�2�- RELAY PULSE DURATION The alarm relay can behave in 2 different ways: 1�- The relay is activated when the alarm is triggered and is deactivated when the alarm...
DHC-96 Aac i--H , Active alarm when the current is higher than the alarm value. F--L , Active alarm when the frequency is less than the alarm value. i--L , Active alarm when the current is less than the alarm value.
DHC-96 Aac To validate the data, press the key. Use the keys to browse the configuration screens of the menu. 5�4�6�- HYSTERESIS This screen is used to configure the hysteresis value, i.e., the difference between the alarm connection and disconnection value.
DHC-96 Aac 5.5.- RELAY OUTPUT 2 , shows the main screen of the configuration menu of relay output 2. Figure 18 do-2 Figure 18:Configuration menu of relay output 2, main screen. The configuration is the same as for alarm relay 1, see “5.4.- RELAY OUTPUT 1”.
DHC-96 Aac Use the , key to modify the value of the flashing digit When the desired value is shown on the screen, press the key to skip the digit. Minimum configuration value: 0 Maximum configuration value: 9999 To validate the data, press the key.
DHC-96 Aac 5�6�4�- SAVE CONFIGURATION To save the configuration of the device, press the key until the main screen of the con- figuration menu of the display is opened, Figure 19 Press the key again to show the validation screen.
DHC-96 Aac 6�- RS-485 COMMUNICATIONS The DHC-96 devices have one RS-485 communications port,with communications protocols: MODBUS RTU ® . 6.1.- CONNECTIONS The RS-485 cable must be wired with twisted pair cable with mesh shield, with a maximum distance between the DHC-96 and the master device of 1200 metres.
DHC-96 Aac 6.2.- MODBUS PROTOCOL In the Modbus protocol, the DHC-96 device uses the RTU (Remote Terminal Unit) mode. The Modbus functions implemented in the device are as follows: Function 0x01: Reading a relay. Function 0x02: Reading input status. Function 0x03 and 0x04: Reading integer registers.
DHC-96 Aac Response: Initial Address Function Relay action Register 0000 FF00 8C3A 6.3.- MODBUS COMMANDS 6�3�1�- MEASUREMENT VARIABLES AND DEVICE STATUS All the addresses of Modbus memory are in Hexadecimal. For these variables is implemented the Function 0x03 and 0x04.
DHC-96 Aac 6�3�4�- REMOTE CONTROL OUTPUT (Relay output) All the addresses of Modbus memory are in Hexadecimal. For these variables is implemented the Function 0x05 and 0x0F� Table 11: Modbus memory map (Table 5) Parameter Format Address Value 0: open, 1: closed...
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DHC-96 Aac Table 14 (Continuation): Modbus memory map : Analog output Analog output Variable Format Address Valid data margin 0: 4 ... 20 mA Type of output 1: 0 ... 20 mA 2: 4... 12 ... 20 mA SC: Secondary current.
DHC-96 Aac 7�- TECHNICAL FEATURES AC Power supply 80 ... 270 V ~ Rated voltage Frequency 50 / 60 Hz Consumption 2.6 ... 4.9 VA Installation category CAT III 300 V DC Power supply Rated voltage 80 ... 270 V 18 ...
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DHC-96 Aac RS-485 communications Communications protocol Modbus RTU Baud rate 2400 - 4800 - 9600 - 19200 bps Data bits Stop bits 1 - 2 Parity without, even, odd User interface Display LED 5 digits Keyboard 4 keys Environmental features Operating temperature -40ºC ...
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DHC-96 Aac 10(max) 68.5 81.2 Figure 22: Dimensions of the DHC-96� Instruction Manual...
• CIRCUTOR accepts no liability due to the possible damage to the unit or other parts of the installation, nor will it cover any possible sanctions derived from a pos- sible failure, improper installation or “improper usage”...
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