martens TV125M User manual

Operating Manual
Universal Isolating Amplifier
TV125M / ST125M
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www.ghm-messtechnik.de
Companies / Brands of GHM
English

GHM Messtechnik GmbH –Standort Martens
Kiebitzhörn 18 ● 22885 Barsbüttel ● Germany
Phone [phone] ● Fax -288
www.ghm-messtechnik.de ● [e-mail]
2
Table of contents Page
1Intended use (areas of application) ...........................................................................3
1.1 Safety signs and symbols 4
1.2 Safety instructions 4
1.3 Product liability and warranty 5
1.4 Standards and directives 5
2Product description.....................................................................................................6
2.1 Scope of delivery 6
2.2 Functional principle 6
2.3 Block circuit diagram 7
2.4 Type plate 7
2.5 PowerRail mounting rail bus 8
3Assembly and installation ..........................................................................................9
3.1 Mechanical assembly 9
3.2 Electrical installation 9
3.3 Connection diagram 10
4Controls, functional description, output, transmitter feed....................................10
4.1 Controls, functional description 10
4.2 Status LED 12
4.3 Output 12
4.4 Transmitter feed (only ST125) 12
5Commissioning, maintenance and service.............................................................13
5.1 Commissioning 13
5.2 Maintenance 13
5.3 Service 13
6Technical data............................................................................................................14
6.1 Mechanical design / dimensions 18
7Order key....................................................................................................................19
8Device transport and storage...................................................................................20
9Return to manufacturer.............................................................................................20
10 Disposal......................................................................................................................20
11 Imprint.........................................................................................................................20
12 EC Certificate of conformity.....................................................................................21

GHM Messtechnik GmbH –Standort Martens
Kiebitzhörn 18 ● 22885 Barsbüttel ● Germany
Phone [phone] ● Fax -288
www.ghm-messtechnik.de ● [e-mail]
3
1 Intended use (areas of application)
Refer to the chapter 'Product description' for detailed specifications for
the area of application.
The operational safety of the device is only assured when used as in-
tended in accordance with the specifications in the operating manual.
Intervention beyond the actions described in the operating manual may only be car-
ried out by personnel authorised by the manufacturer for safety and warranty rea-
sons. Conversions or modifications made on one's own authority are expressly pro-
hibited.
Application-specific dangers can emanate from this device when used improperly or
not as intended.
Only device versions TV125M-Ex, TV125MP-Ex, ST125M-Ex and
ST125MP-Ex are permitted for use as operating equipment for connec-
tion of intrinsically safe sensors, installed in Zones 0 or 1 and/or 20
or 21.
All safety-relevant characteristic data must be observed in this connec-
tion.
The approval for all intrinsically safe operating equipment is voided if it
has been previously connected to non-intrinsically safe power circuit,
because compliance with the safety-relevant characteristic data cannot
be 100% guaranteed there.
Therefore, a safety test must be conducted by the manufacturer before
later use as an intrinsically safe operating device.
The device TV125MP-00, ST125MP-00 and all other versions of the
series TV****-Ex and ST****-Ex can be installed in the explosion-prone
Zone 2 under the following conditions:
- Installation in a clean environment in a conductive, earthed housing
(switch cabinet) with a minimum protection rating of IP54.
- Disconnection of connecting terminals only takes place in the
de-energised state
Basic standards: EN 60079-0 and EN 60079-15.
General safety instructions, use
This operating manual must be kept in a location such that qualified personnel can
refer to it at all times.
Any processes described in this operating manual may only be carried out by
trained, qualified personnel who are authorised by the owner and wearing protective
clothing. All rights reserved.

GHM Messtechnik GmbH –Standort Martens
Kiebitzhörn 18 ● 22885 Barsbüttel ● Germany
Phone [phone] ● Fax -288
www.ghm-messtechnik.de ● [e-mail]
4
1.1 Safety signs and symbols
Warning notices are identified in this document as described under Table 1:
1.2 Safety instructions
Read the product description before commissioning the device. Ensure
that there are no limitations for use of the product for the relevant applica-
tions.
The owner is responsible for ensuring the fault-free operation of the de-
vice. The owner is obligated to ensure compliance and to observe the re-
quired work and safety measures of the current applicable regulations for the entire
duration of use.
DANGER
Warning! This symbol warns of imminent danger which can result in
death, severe bodily injury, or severe property damage in case of
non-observance.

Attention! This symbol warns of potential dangers or harmful situa-
tions which can cause damage to the device or to the environment
in case of non-observance.
Note! This symbol indicates processes which can have a direct in-
fluence on operation or can trigger an unforeseen reaction in case of
non-observance.
DANGER

GHM Messtechnik GmbH –Standort Martens
Kiebitzhörn 18 ● 22885 Barsbüttel ● Germany
Phone [phone] ● Fax -288
www.ghm-messtechnik.de ● [e-mail]
5
1.3 Product liability and warranty
Exclusion of liability:
The contents of the operating manual have been checked to ensure conformity with
the described device. However, deviations cannot be entirely ruled out. Therefore, we
cannot assume any guarantee for complete conformity. The specifications in this
document are checked regularly and any necessary corrections are incorporated into
subsequent versions. This document is subject to technical changes. In addition, all
claims are based on the valid 'Standard Terms for the Supply of Products and Ser-
vices of the Electrical Industry'.
GHM Messtechnik cannot inspect or repair any devices without the re-
quired form having been filled in completely (see page 20).
1.4 Standards and directives
Conformity
Low Voltage Directive 2014/35/EU
Testing standard EN 61010-1: 2010
EMC Directive 2014/30/EU
Testing standard EN 61326-1: 2013
EN 61326-3-1: 2008, amended 2009
ATEX- Directive 2014/34/EU
Testing standard EN 60079-0: 2012 + A11 : 2013,
EN 60079-11: 2012,
EN 60079-15: 2011
Funktionale Sicherheit
Testing standard EN 61508-1..5: 2011
SN 29500: 2013


GHM Messtechnik GmbH –Standort Martens
Kiebitzhörn 18 ● 22885 Barsbüttel ● Germany
Phone [phone] ● Fax -288
www.ghm-messtechnik.de ● [e-mail]
6
2 Product description
Isolating amplifiers of the series TV/ST125 are suitable for potential isolation and for
conversion of unit signals - optionally in explosion-prone environments. The universal
configuration of the input, output and internal power supply by means of a wide-range
mains adapter limits the number of models to a few versions. The auxiliary voltage
supply can be optionally provided by means of a mounting rail bus connector.
The input measuring range can be switched between 0..20 mA and 4..20 mA and/or
0..10 V and 2..10 V on the front side via a DIP switch. The output measuring range
can be configured between 0..20 mA and 4..20 mA and/or 0..10 V and 2..10 V on the
front side via a DIP switch.
With the microprocessor-controlled measurement recording, undercutting and exceed-
ing of measuring ranges are detected and communicated via a two-colour status LED
on the front side. Then the output is set to a defined starting value and/or end value.
The starting value and the end value of the measuring range can be adjusted with the
two trimmers on the front side.
The device version ST125 provides an additional transmitter feed for external 2, 3-
wire sensors.
The devices can also be used in the explosion-prone Zone 2 if they are installed in a
suitable housing.
Use in systems with functional safety SIL2 is also possible.
2.1 Scope of delivery
 TV125 or ST125
 This operating manual
2.2 Functional principle
The input signals are amplified in the input stage, the amplitudes are limited and the
band is limited with an analogue filter of the third order. The filtered signal is digital-
ised by the analogue-digital converter of the microprocessor with a resolution of 14
bits. After scaling and a measuring range check, the signal is transmitted by means of
pulse width modulation via an optocoupler to the output stage.
The output stage converts the PWM signal to a proportional analogue value which is
then output via the output. The output current and/or output voltage are limited to a
defined starting value and/or end value. The three circuits: Input, output and auxiliary
voltage are galvanically isolated with amplified isolation.

GHM Messtechnik GmbH –Standort Martens
Kiebitzhörn 18 ● 22885 Barsbüttel ● Germany
Phone [phone] ● Fax -288
www.ghm-messtechnik.de ● [e-mail]
7
2.3 Block circuit diagram
2.4 Type plate
The type plate contains the most important identification data
Type and article designation
Technical data
Serial number / bar code
Fig. 2: Type plate
Fig. 1: Block circuit diagram

GHM Messtechnik GmbH –Standort Martens
Kiebitzhörn 18 ● 22885 Barsbüttel ● Germany
Phone [phone] ● Fax -288
www.ghm-messtechnik.de ● [e-mail]
8
2.5 PowerRail mounting rail bus
The auxiliary voltage supply of multiple devices can be combined and made easier
with a bus system in the mounting rail (TS35).
An appropriate version is available for the entire MP series or GHM rail bus devices
in a 12.5mm-wide housing.
A stackable bus adapter is connected to the mounting rail before installing the de-
vice to be supplied.
An adapter is required for each device for this purpose. Supply of the bus takes
place via a plug-in terminal strip.
The supply terminals 11 and 12 on the upper side of the device are omitted device
version TV/ST125MP provided for this purpose.

GHM Messtechnik GmbH –Standort Martens
Kiebitzhörn 18 ● 22885 Barsbüttel ● Germany
Phone [phone] ● Fax -288
www.ghm-messtechnik.de ● [e-mail]
9
DANGER
3 Assembly and installation
3.1 Mechanical assembly
Mounting rail assembly TS35, EN 60715
Gapless installation of several devices is only permitted with horizontally installed
mounting rails.
The devices can be installed in Ex Zone 2 within an earthed, conductive housing
(switch cabinet) with protection rating IP54.
3.2 Electrical installation
The device may only be installed by an electrician. Compliance with the
national and international regulations for installation of electrical and elec-
tronic systems applicable in the respective country of use is mandatory.
Voltage supply in accordance with EN 60664-1.
SIL 2 requires an EMC-adequate installation, according to EN 60204-1 (for example)
Connection of the auxiliary voltage takes place at connections 11 and 12 of the plug-in
terminal strip.
Terminals 41 and 42 are intended for the input and terminals 51 and 52 are for the
transmitter feed.
The active analogue output is provided at terminals 31 and 32.
Three are two DIP switches in the front panel for configuration of the input measuring
range and the output range. The starting value and the end value of the measur-
ing range can be adjusted with the two trimmers on the front side.

GHM Messtechnik GmbH –Standort Martens
Kiebitzhörn 18 ● 22885 Barsbüttel ● Germany
Phone [phone] ● Fax -288
www.ghm-messtechnik.de ● [e-mail]
10
Status LED
Message
Green LED illumi-
nates
Operating voltage
connected
Red and green LEDs
blink
See Table 7:
Status messages
Red LED illuminates
See Table 7:
Status messages
3.3 Connection diagram
4 Controls, functional description, output, transmitter feed
4.1 Controls, functional description
Trimmer
Adjustment
TR1
Starting value
TR2
End value
Tab. 3: Trimmer
Tab. 2: Status LED
Fig. 4: Front panel
S1: On
Off
S2: On
Off
S3: On
Off
S4: On
Off
TR1
Status LED
TR2
Fig. 3: Connection diagram
Auxiliary voltage: 85..253 VAC / 20..125 VDC
or 24 VDC +/- 15 %
Output: 0/2..10V or 0/4..20 mA
Input: 0/2..10 V or 0/4..20 mA
Transmitter feed (only ST125):