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 PART #22018-DH - High-Resolution Positioner 
 

 

 

Page 5

 

 

 

 

POWER / SIGNAL: (J2): 

The  positive  terminal  of  the  DC  power  source  is  connected  to  pin  1  while  the  negative  terminal 
connects to pin 2. When the DHC-400 is mounted to a metal bracket or directly to the actuator case, 
pin 3 provides a terminal for an earth ground connection to the actuator body. In applications where 
the  actuator  body  is  non-metallic  or  is  electrically  isolated  from  earth  ground,  pin  3  must  be 
connected to earth ground to prevent static voltage buildups. 

Transferring DC power can be inefficient, therefore care should be taken to use appropriate wire 
sizes. The size wire required depends on the locked rotor motor current and the length of wire to be 
used. See the Wire Table for more information. 

An appropriate command signal, either 0-5V, 0-10V, 1-5V, 2-10V, or 4-20mA, should be connected 
to pin 5 (as shown in the Block Diagram) while using pin 4 as the return signal ground. See Wiring 
Diagrams, Input Configurations, for wiring details. The DHC-400 must be configured for the type of 
command signal that is to be used (see COMMAND TYPE). 

Pin  6  of  J2  provides  an  auxiliary  +5V  output  which  can  be  used  to  connect  a  command 
potentiometer. By connecting one end of a potentiometer to pin 6, the other end to pin 4, and the 
wiper to pin 5, a local control knob can be implemented. Pin 4 will also need to be connected to pin 
2 (BAT NEG) for this application. 

ACTUATOR (J1): 

The actuator motor and feedback potentiometer are connected to J1 as shown in the Block Diagram. 
The feedback potentiometer wiper must be connected to pin 5, while one end is connected to pin 4 
and the other end to pin 6. The Polarity Detection feature of the DHC-400 automatically determines 
which  polarity  to  apply  to  the motor  based  on  where  the  open and  closed positions  are set;  this 
feature also eliminates the need to rewire the unit for direct or reverse acting applications. 

Many actuators include limit switches that are used to turn off the motor when the extreme ends of 
travel have been reached. Limit switches should be wired to pins 6, 7, and 8 as shown in the Block 
Diagram. If limit switches are not used, pins 7 and 8 must be connected to pin 6 (note, if pins 7 and 
8 are not connected to pin 6, the DHC-400 will not be able to control the motor outputs). 

When  the  ▲  and  ▼  buttons  are  used  to  control  the  actuator,  the  ▲  button  will  connect  pin  4 
(MOTOR 1) to BAT POS (J2-1) and pin 5 (MOTOR 2) to BAT NEG (J2-2) as long as pin 7 (LIMIT 
SW1) is connected to pin 6 

(LIMIT COMMON). Likewise, the ▼ button will connect pin 5 to BAT 

POS and pin 4 to BAT NEG as long as pin 8 (LIMIT SW2) is connected to LIMIT COMMON. 

Since pins 4 and 5 are alternately connected to BAT POS (J2-1) and BAT NEG (J2-2), care should 
be taken not to connect the motor output pins to any other terminals. See MANUAL/FB POT CAL 
for more details. 

The DHC-400 provides a dynamic braking feature that can eliminate the need for a separate brake. 
When the DHC-400 turns off the motor outputs, pins 4 and 5 are internally connected to the BAT 
NEG  pin  (J2-2);  this  has  the  effect  of  shorting  the  motor  leads  together,  thus  braking  the  motor 

Summary of Contents for 22018-DH

Page 1: ......

Page 2: ...ry switches fault relay contact or digital communications A wide range of data is accessible through a digital communications module providing additional control or information ADDITIONAL FEATURES 10...

Page 3: ...PART 22018 DH High Resolution Positioner Page 3 BOARD OUTLINE...

Page 4: ...it s size and mounting allows the DHC 400 to replace the DMC 100 series controllers in most applications with minimal rewiring The simple three button control MODE and allows the user to perform a com...

Page 5: ...otentiometer are connected to J1 as shown in the Block Diagram The feedback potentiometer wiper must be connected to pin 5 while one end is connected to pin 4 and the other end to pin 6 The Polarity D...

Page 6: ...ators will flash to indicate specific settings associated with the mode Each of the modes are described in more detail in the following sections If a 0 5V or 0 10V command signal is used the LOSS OF C...

Page 7: ...r closed positions are reached However if a feedback fault occurs see FAULT INDICATOR the motor will be turned on for a period of 15 minutes in the selected direction For this reason limit switches sh...

Page 8: ...manual operation of the actuator by using the adjust buttons and without affecting any other settings within the DHC 400 When the button is pressed the MOTOR 1 J1 4 output is connected to BAT POS J2 1...

Page 9: ...The adjust buttons are used to set the actuator to a desired position Whenever the actuator position falls between the defined closed position and the Aux Close position the Aux Close Output indicator...

Page 10: ...s the selected default setting by flashing the Open function indicator for the open default position or it will flash the Close function indicator for the closed default position When neither indicato...

Page 11: ...sed when operating the motor under a fault condition The OVERRIDE mode can also operate the motor when a fault condition exists see OVERRIDE MODE for details Note that the indicators may not indicate...

Page 12: ...disabled The command signal cannot clear this condition only manual operation or a mechanical override can clear the fault Alternatively the DHC 400 can be powered off and then on to temporarily clea...

Page 13: ...d The fault can be cleared in the same manner as previously described for a Double Stall Feedback Alarm A fault condition is detected whenever the feedback signal is out of range that is less than 5 o...

Page 14: ...lows the use of a more moderate battery power supply and smaller gauge wires for a given length see WIRE TABLE The trip setting essentially performs the same function as commonly used torque switches...

Page 15: ...turn actuator the return spring can generate high electrical energies while back driving the motor that can damage the DHC 400 motor outputs In this application the motor must be disconnected usually...

Page 16: ...VDC input 10 5V 0 10 VDC 2 10 VDC input 21mA 4 20mA input A FEEDBACK SIGNAL INPUT Input Voltage 0 to 2 5 VDC External Feedback Potentiometer 1K ohm COMMAND POTENTIOMETER POWER OUTPUT J2 6 5V OUT 5mA...

Page 17: ...PART 22018 DH High Resolution Positioner Page 17 WIRING DIAGRAMS Output Configurations...

Page 18: ...PART 22018 DH High Resolution Positioner Page 18 WIRING DIAGRAMS Input Configurations...

Page 19: ...PART 22018 DH High Resolution Positioner Page 19 WIRING DIAGRAMS Special Applications...

Page 20: ...PART 22018 DH High Resolution Positioner Page 20 WIRING DIAGRAMS Special Applications...

Page 21: ...voltage drop of 1VDC with 20 of the locked rotor current and assumes that the full load running current is less than that All signal wires on the DHC 400 should be connected with wire sizes ranging f...

Page 22: ...____________________________ _________________________________________________________________ _________________________________________________________________ _______________________________________...

Page 23: ...____________________________ _________________________________________________________________ _________________________________________________________________ _______________________________________...

Page 24: ...24 Contact Information Debbie Voges dvoges indelac com 859 727 7890 ext 100 Matt Robinson mrobinson indelac com 859 727 7890 ext 109 Talbot Caywood tcaywood indelac com 859 727 7890 ext 110 For News U...

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