Setra SRH200 Manual

Model SRH200

Operating Instructions

Setra Systems, Inc.

159 Swanson Road, Boxborough, MA 01719

800.257.3872 • www.setra.com

Contents

1.0 General information .......................................................................................................3

2.0 Caution .............................................................................................................................. 3

3.0 Connection diagrams......................................................................................................3

4.0 LED indication...................................................................................................................4

5.0 Scope of supply................................................................................................................4

6.0 BACnet or modbus setup ............................................................................................... 5

6.1 BACnet address using address switch ...........................................................5

6.2 BACnet address using software .......................................................................6

6.3 Modbus address using software .....................................................................8

6.4 Modbus address using address switch ........................................................10

6.5 Modbus setup ....................................................................................................11

7.0 Technical data ...............................................................................................................12

8.0 Setup and adjustment ..................................................................................................13

9.0 Maintenance ..................................................................................................................14

9.1 Humidity calibration and adjustment ............................................................14

9.2 Temperature calibration and adjustment ......................................................14

9.3 When employed in dusty, polluted environment .........................................14

10.0 Accessories ...............................................................................................................15

11.0 Returning products for repair or replacement ......................................................16

11.1 Calibration services ........................................................................................16

12.0 Limited warranty and limitation of repair ...............................................................17

1.0 General information

The Setra Systems Model SRH200 transmitter, available for wall or duct mounting, is designed
for the measurement of humidity and temperature in HVAC applications.

For use in special applications, please contact Setra Systems.

2.0 Caution

• For accurate measurement, it is essential that the temperature of the sensing probe and the
sensing head is same as the temperature of the air to measure. Avoid mounting the SRH200
transmitter in a way which creates temperature gradients along the probe.

• The transmitter and the sensing head should not be exposed to extreme mechanical stress.

• The transmitter must be operated with the lter cap on at all times. DO NOT touch the
sensors inside the sensing head.

3.0 Connection Diagrams

SRH200 - Analog volts

SRH200 - Analog milliamps

SRH200 - Digital

DO NOT CONNECT!

Bus termination resistor 120 Ω (jumper)

3

4.0 LED indication

Green LED Blue LED

Setra Product Conguration Adapter

On Everything okay

Main board does not recognize the

Flashing

measurement electronics inside the
sensing probe

Off No power supply or main board failure PCA not connected to the SRH200

(SETRAPCA1) is powered, no
communication in progress

PCA powered, communication in
progress

5.0 Scope of supply

SRH200 wall mount

Model

SRH200 Transmitter according to

ordering guide

Cable tting

Mounting kit

Mounting flange

Calibration & inspection certicate

according to DIN EN10204 - 3.1

Quick Guide -

SRH200 RS485 Setup included with all BACnet & Modus units

(Type A)

SRH200 Duct mount

(Type B)

4

6.0 BACnet or Modbus setup

6.1 Setup BACnet address using the address switch

Remove the unit’s faceplate. You will see an address switch (pictured below). If you wish to set

the address of the unit using this switch, you must rst identify and make note of an available

address found on your network.

Before connecting the device to your network, set the address you wish to have on the switch
following the above format and table below.

Note: You will see from the table there are 8 positions. For this device, the 8th position (or 8th
bit) is ignored.
For Example: ID 127=0111111

BACnet PICS for this unit are available for download at www.setra.com. This unit’s ID as well
as many other properties are also read/writable from your BACnet console.

SRH200 Default=2 Permitted=0...127 (BACnet)

SRH300 Default=1 Permitted=0...127 (BACnet)

5

6.2 Sitting BACnet address using the software

Remove the unit’s faceplate. You will see an address switch (pictured below). If you wish to

set the address of the unit using the Setra product conguration software, verify all these

switches are set to “0”.

Prior to adding unit to your network, power up the unit according to diagram on page 3. Now

connect the Setra PCA adapter to the unit and to your laptop.

Start the Setra product conguration software. The software should automatically identify

your unit after a few seconds and begin graphing and displaying sensor data.

6

Click on the communication settings found on left menu. The screen below will be displayed.
Here you can set band rate, data, parity, and stop bits. In the bus address cell, you can enter
the following ranges.

SRH200 Default=2 Permitted=0...127 (BACnet)

SRH300 Default=1 Permitted=0...127 (BACnet)

Note: Regardless of whether you are setting the address in the software or by using the
address switch the following settings are recommended.

38400/8/NONE/1

7

6.3 Setting Modbus address using the software

Remove the unit’s faceplate. You will see an address switch (pictured below). If you wish to

set the address of the unit using the Setra product conguration software, verify all these

switches are set to “0”.

Prior to adding unit to your network, power up the unit according to connection diagram on

page 3. Now connect the Setra PCA adapter to the unit and to your laptop.
Start the Setra product conguration software. The software should automatically identify

your unit after a few seconds and begin graphing and displaying sensor data.

8

Click on the communication settings found on left menu. The screen below will be display.
Here you can set baud rate, data, parity and stop bits.
In the Bus address cell, you can enter the following ranges.

SRH200 Default=245 Permitted=0...247 (modbus)

SRH300 Default=242 Permitted=0...247 (modbus)

9

6.4 Setting Modbus address using the address switch

Remove the unit’s faceplate. You will see an address switch (pictured below). If you wish to set

the address of the unit using this switch, you must rst identify and make note of an available

address found on your network.

Before connecting the device to your network, set the address you wish to have on the switch
following the above format and table below.

SRH200 Default=245 Permitted=1...247 (Modbus)

SRH300 Default=242 Permitted=1...247 (Modbus)

10

6.5 Modbus setup

The measured values are saved as a 32 bit float value from 0x19 to 0x1B. Additionally, the
measured values can be read as 16 bit signed integer from 0x12C to 0x12D.

The factory setting for the Slave-ID is 245 as an integer 16Bit value. This ID can be customized
in the register 60001 (0x00) (value margin 1 - 247 permitted).

For Modus outputs the required units (metric or non-metric) must be selected in the “Ordering

guide”, see SRH200 data sheet.

FLOAT (read register):

Register
address

30026 0x19 Temperature [°C],[°F]

30028 0x1B Relative humidity [%]

Comm.
address

Parameter
name

INTEGER (read register):

Register
address

30301 0x12C Temperature [°C],[°F]

30302 0x12D Relative humidity [%]

Note: Values are stored with a scaling of 1:100
(e.g.: 2550 is equivalent to 25.5°C)

Protocol setting:

Address, baud rate, parity and stop bits can be set via the congurator software (available on www.setra.com).

Comm.
address

Parameter
name

INFO (read register):

Register
address

30001 0x00 Serial number (as ASCII)

30009 0x08 Firmware version

Comm.
address

Parameter
name

INTEGER (write register):

Register
address

60001 0x00 Slave-ID (Modbus address)

60002 0x01 Modbus protocol settings

Comm.
address

Parameter
name

11

7.0 Technical data

General

Power Supply

for 4-20 mA, 2-wire: 10 V + RL x 20 mA < UV < 35 VDC

for 0-10 V or RS485: 15-35 VDC or 24 VAC ±20%

Current consumption

Analog:

Digital:

Connection Screw terminals, max. 1.5 mm

Housing material Polycarbonate, UL94V-0 approved

Protection class IP65/ NEMA 4

Cable tting PG9 M16 x 1.5

Sensor protection Membrane lter

Electromagnetic compatibility

Temperature ranges

Measured values

Relative humidity (RH) sensor

Working range (RH) 0-100% RH

Accuracy at -40 to 140°F (RH) ±2.5% RH

Temperature dependency typ. ±0.03% RH/°C

Temperature (T) sensor (tolerance class B, DIN EN 60751)

T-accuracy at 20°C ±0.3 °C

w/ DC power supply typ. 5 mA

w/ AC power supply typ. 13 mA

w/ DC power supply typ. 15 mA
w/ AC power supply typ. 25 mA

EN61326-1

EN61326-2-3

Operating: -40 to 140°F (-40 to 60°C)

Storage: -40 to 140°F (-40 to 60°C)

2

Outputs

Analog output

0-10 V: -1 mA < IL < 1 mA

4-20 mA (2-wire): RL < 500 Ω

Digital output

RS485 (BACnet MS/TP or Modbus RTU),

max.32 SRH200 units in one bus

12

8.0 Setup and adjustment

The SRH200 transmitter is ready to use and does not require any conguration by the user. The

factory setup of SRH200 corresponds to the type number ordered. For ordering guide please
see data sheet at www.setra.com. If need, the user can change the factory setup by using the

optional Setra Conguration Adapter and the Setra Product Conguration Software.

SETRAPCA2 for analog outputs
SETRAPCA3 for digital outputs

PCA

One can assign other physical quantities to the analogue outputs, change the scaling of the

outputs and perform one or two point adjustment for humidity and temperature.

The Setra Product Conguration Software is free and can be downloaded from www.setra.com.

SRH200

13

9.0 Maintenance

9.1 Humidity calibration and adjustment

Depending on the application and the requirements of certain industries, there might arise the
need for periodical humidity calibration (comparison with a reference) or adjustment (brining
the device in line with a reference).

Calibration and adjustment at Setra

Calibration and/or adjustment can be performed by the Setra calibration laboratory. For

information on the Setra capabilities in ISO or accredited calibration visit www.setra.com.

Calibration and adjustment by the user

Depending on the level on accuracy required, the humidity reference can be:

• Humidity calibrator - Purchased separately (not currently sold by Setra)

• Hand held device - Purchased separately (not currently sold by Setra)

• Calibrated salt solutions - most economical

9.2 Temperature calibration and adjustment

Due to the outstanding protection of the temperature sensing element integrated in the Setra
sensor, a drift of the T measurement is rather unlikely. If adjustment seems necessary, the
user can perform a one or two point T adjustment with PCA and PCS against a reference
of choice, it is highly recommended to return the device to the manufacturer for this. The

reasons rest on the difculty of an accurate T calibration in the air. Out calibration shall take

into account the self-heating of 8RH200 with closed enclosure, in its real mounting position
and in continuous operation. The impact of the output current and of the probe orientation to
the self-heating, as well as the cooling effect of the air circulation in the climate chamber used
for calibration.

9.3 When employed in dusty, polluted environment

The lter cap shall be replaced once in a while with a Setra original. A polluted lter cap causes

longer response time of the device.
If needed, the sensing head can be cleaned. For cleaning instructions please see
www.setra.com.

14

10.0 Accessories

Category Setra Accessory P/N Description

Filters SRHMF Membrane lter

Filters SRHSS Stainless steel sintered lter

Filters SRHPG Plastic grid lter

Filters SRHPF PTFE - lter Ø12mm

Filters SRHMG Metal grid lter

Filters SRHHP H2O2 - lter

Flanges SRHPMFG Plastic mounting flange 12mm; grey

Flanges SRHMFB Plastic mounting flange 12mm;

black

Part conguration adapter SETRAPCA1 Conguration adapter transmitter to

RS23 and USB

Part conguration adapter SETRAPCA2 Conguration cable for SRH200

analog

Part conguration adapter SETRAPCA3 conguration cable for SRH200

digital & SRH300

Calibration SRH200SCAL SRH200 calibration (ISO)

Calibration SRH200NCAL SRH200 calibration (NIST)

15

11.0 Returning products for repair or replacement

Please contact a Setra application engineer (800-257-3872, 978-263-1400) before returning

unit for repair to review information relative to your application. Many times only minor eld

adjustments may be necessary. If a return is required please call 1-800-257-3872 or email

[e-mail] to obtain an RMA number before sending unit(s) back to us. Once an RMA

number has been assigned to you, please send the package back to the below address.

Setra Systems, Inc.
159 Swanson Road
Boxborough, MA 01719-1304

Attn: RMA #

To download return form, please visit Setra’s service page.

To assure prompt handling, please make sure the RMA number is on the outside of the box and
a copy of the service request from is included in the shipment. If applicable, include a copy of

the PO for return in the shipment.

NOTES:

Please remove any pressure ttings and plumbing that you have installed and enclose any

required mating electrical connectors and wiring diagrams.

Allow approximately 3 weeks after receipt at Setra for the repair and return of the unit. Non-

warranty repairs will not be made without customer approval and a purchase order to cover
repair chargers.

11.1 Calibration Services

Setra maintains a complete calibrations facility that is traceable to the National Institute of
Standards and Technology (NIST). If you would like to recalibrate or recertify your Setra product,

please call our Customer Service Department at 800-257-3872 (978-263-1400) for scheduling.

16

12.0 Limited warranty & limitation of repair

SETRA warrants its products to be free from defects in materials and workmanship, subject

to the following terms and conditions: Without charge, SETRA will repair or replace products

found to be defective in materials or workmanship within the warranty period; provided that:

a) the product has not been subjected to abuse, neglect, accident,

incorrect wiring not our own, improper installation or servicing, or

use in violation of instructions furnished by SETRA;

b) the product has not been repaired or altered by anyone except

SETRA or its authorized service agencies;

c) the serial number or date code has not been removed, defaced, or

otherwise changed; and

d) examination discloses, in the judgment of SETRA, the defect in

materials or workmanship developed under normal installation, use

and service;

e) SETRA is notied in advance of and the product is returned to

SETRA transportation prepaid.

Unless otherwise specied in a manual or warranty card, or agreed to in writing and signed by

a SETRA ofcer, SETRA pressure, humidity, and acceleration products shall be warranted for

one year from date of sale.

The foregoing warranty is in lieu of all warranties, express, implied or statutory, including but

not limited to, any implied warranty of merchantability for a particular purpose.

SETRA’s liability for breach of warranty is limited to repair or replacement, or if the goods

cannot be repaired or replaced, to a refund of the purchase price. In no instance shall SETRA

be liable for incidental or consequential damages arising from a breach of warranty, or from

the use or installation of its products.

No representative or person is authorized to give any warranty other than as set out above or

to assume for SETRA any other liability in connection with the sale of its products.

For all CE technical questions, contact Setra Systems, USA. EU customers may contact our

EU representative Hengstler GmbH, Uhlandstr 49, 78554 Aldingen, Germany

(Tel: [phone]; Fax: [phone]).

17

Setra Systems, Inc.

159 Swanson Road, Boxborough, MA 01719

800.257.3872 • www.setra.com

SS-SRH200 Rev. B 10/2018