HACH DOC2739790667 4-20 mA Analog Input Module Instruction Manual
- October 30, 2023
- HACH
Table of Contents
HACH DOC2739790667 4-20 mA Analog Input Module Instruction Manual
General information
In no event will the manufacturer be liable for direct, indirect, special, incidental or consequential damages resulting from any defect or omission in this manual. The manufacturer reserves the right to make changes in this manual and the products it describes at any time, without notice or obligation. Revised editions are found on the manufacturer’s website.
Safety information
The manufacturer is not responsible for any damages due to misapplication or
misuse of this product including, without limitation, direct, incidental and
consequential damages, and disclaims such damages to the full extent permitted
under applicable law. The user is soley responsible to identify critical
application risks and install appropriate mechanisms to protect processes
during a possible equipment malfunction. Please read this entire manual before
unpacking, setting up or operating this equipment. Pay attention to all danger
and caution statements. Failure to do so could result in serious injury to the
operator or damage to the equipment. Make sure that the protection provided by
this equipment is not impaired. Do not use or install this equipment in any
manner other than that specified in this manual.
Use of hazard information
D A N G E R
Indicates a potentially or imminently hazardous situation which, if not
avoided, will result in death or serious injury.
W A R N I N G
Indicates a potentially or imminently hazardous situation which, if not
avoided, could result in death or serious injury.
C A U T I O N
Indicates a potentially hazardous situation that may result in minor or
moderate injury.
N O T I C E
Indicates a situation which, if not avoided, may cause damage to the
instrument. Information that requires special emphasis
Precautionary labels
Read all labels and tags attached to the instrument. Personal injury or damage
to the instrument could occur if not observed. A symbol on the instrument is
referenced in the manual with a precautionary statement.
This symbol, if noted on the instrument, references the instruction manual for operation and/or safety information.
This symbol indicates that a risk of electrical shock and/or electrocution exists.
This symbol indicates the presence of devices sensitive to Electro-static Discharge (ESD) and indicates that care must be taken to prevent damage with the equipment.
Electrical equipment marked with this symbol may not be disposed of in European domestic or public disposal systems. Return old or end-of-life equipment to the manufacturer for disposal at no charge to the user.
Product overview
The 4-20 mA input module lets the controller accept one external analog signal
(0-20 mA/4-20 mA). The input module connects to one of the analog sensor
connectors inside the controller.
Product components
Make sure that all components have been received. Refer to Figure 1. If any
items are missing or damaged, contact the manufacturer or a sales
representative immediately.
Product components
- 4-20 mA analog input module
- Module connector
- Label with wiring information
Icons used in illustrations
-
Manufacturer supplied parts
-
User supplied parts
-
Look
-
Listen
-
Do one of these options
Specifications
Specifications are subject to change without notice.
| Specification | Details |
|---|---|
| Input current | 0–25 mA |
| Input resistance | 100 Ω |
| Wiring | Wire gauge: 0.08 to 1.5 mm2 (28 to 16 AWG) with an insulation rating |
of 300 VAC or higher
Operating temperature| -20 to 60 °C (-4 to 140 °F); 95% relative humidity,
non-condensing
Storage temperature| -20 to 70 °C (-4 to 158 °F); 95% relative humidity, non-
condensing
Installation
D A N G E R
Multiple hazards. Only qualified personnel must conduct the tasks described in
this section of the document.
D A N G E R
Electrocution hazard. Remove power from the instrument before this procedure
is started.
D A N G E R
Electrocution hazard. High voltage wiring for the controller is conducted
behind the high voltage barrier in the controller enclosure. The barrier must
remain in place unless a qualified installationtechnician is installing wiring
for power, alarms, or relays.
W A R N I N G
Electrical shock hazard. Externally connected equipment must have an
applicable country safety standard assessment.
N O T I C E
Make sure that the equipment is connected to the instrument in accordance with
local, regional and national requirements.
Electrostatic discharge (ESD) considerations
N O T I C E
Potential Instrument Damage. Delicate internal electronic components can be
damaged by static electricity, resulting in degraded performance or eventual
failure. Refer to the steps in this procedure to prevent ESD damage to the
instrument:
- Touch an earth-grounded metal surface such as the chassis of an instrument, a metal conduit or pipe to discharge static electricity from the body.
- Avoid excessive movement. Transport static-sensitive components in anti-static containers or packages.
- Wear a wrist strap connected by a wire to earth ground.
- Work in a static-safe area with anti-static floor pads and work bench pads.
Install the module
Install the module in the controller. Refer to the illustrated steps that
follow.
Notes:
- Make sure that the controller is compatible with the 4–20 mA analog input module. Contact technical support.
- To keep the enclosure rating, make sure that all unused electrical access holes are sealed with an access hole cover.
- To maintain the enclosure rating of the instrument, unused cable glands must be plugged.
- Connect the module to one of the two slots on the right side of controller. The controller has two analog module slots. The analog module ports are internally connected to the sensor channel. Make sure that the analog module and the digital sensor are not connected to the same channel. Refer to Figure 2.
Note: Make sure that only two sensors are installed in the controller. Although two analog module ports are available, if a digital sensor and two modules are installed, only two of the three devices will be seen by the controller.
Figure 2 mA input module slots
- Analog module slot—Channel 1
- Analog module slot—Channel 2
