Mayser SG RS 204 User Manual

Y3

Y4Y2Y1

21 A2A1

U

s

Control Unit SG-RS 204

sensor 1 sensor 2

Operating
Instructions

Control Unit

EN 954 category 1

for sensors with
monitoring resistor 1.2 kΩ .

These operating instructions apply to
the following Control Units:

1001825 SG-RS 204 12 V=
1001414 SG-RS 204 24 V=/~
1002943 SG-RS 204/invert 12 V=
1002944 SG-RS 204/invert 24 V=/~

Control

This control unit has two monitoring
circuits which operate one output relay.
The electronics monitor the electrical
resistance of the connected sensor,
which operates on a specic closed-cir­cuit currrent.
When the sensors are not activated the
relay is energized (normal operating
conditions).
When a sensor is activated, or if a break
occurs in the power supply, the relay
de-energized.
In the case of Control Unit
SG-RS 204/ invert the relay contact
functions as a NC contact, not as a
NO contact.

Note

When using only one sensor, bridge the
second input with R = 1.2 kΩ

Enclosure

W × H × D (mm) 22.5 × 75 × 105
Degree of protection IP20
Plug connection each 4 channel
Cable terminals max. 2.5 mm
Weight approx. 100 g

Parts supplied

- Control Unit

Enclosure with electronics module

Mayser Polymer Electric Postfach 30 48 89020 Ulm Germany Tel. [phone] Fax [phone]

200409 v1.7

and plug-in connectors

- Operating Instructions

2

Installation and Operation

Technical Data

Connecting voltage US

SG-RS 204
AC 24 V DC 18 - 32 V
SG-RS 204/invert DC 10 - 16 V
AC 24 V DC 18 - 32 V
Voltage tolerance -15% to +10%
Nominal frequency 50 Hz
Power consumption < 2 VA < 2 W

Relay Data

Switching voltage max. 125 V AC
Switching current max. 5 A

Permissible ambient temperature
range - 25 °C to + 60 °C

Important notes:

- Supply voltage

must be in accordance with the con­necting voltage US indicated on the
type plate.

- Permissible ambient temperature
range

Maintain sufcient distance from heat
sources when mounting into a cabinet
(min. 2 cm).

LED information

- yellow LED "Betätigt K1/K2" (activa­ted K1/K2)
Sensor is activated and relays are
de-energized

- red LED "Störung K1/K2"
(fault K1/K2)
Break in power supply,
Relay de-energized

- green LED "Betrieb" (on)

Line voltage present

DC 10 - 16 V

Installation

Fix the enclosure in any position to an
IEC 60715 35 mm rail.
Wiring takes place in the cable termi­nals of the plug connection:

Sensor 1 Y1, Y2
Sensor 2 Y3, Y4
Supply voltage A1, A2
Relay 1, 2

CAUTION
Do not disconnect the terminals or
unplug the plug connection with
power on!

Commissioning

After connecting up sensors, relay
contacts and mains, carry out a function
test in the following orde:

Sensor not activated

- Output relay is energized

Sensor activated

- yellow LEDs "Betätigt" (activated)
light up

- Output relay is de-energized

Troubleshooting and remedies

Prerequisite: SG-RS 204 connected to connecting voltage US an sensor.

Sensor not activated and Control Unit does not respond:

LED "Betrieb" (on) off.
> Supply voltage off or incorrect.

 Check connecting voltage US, compare with type plate.
 Observe correct polarity.
 Fault still exists: Control Unit faulty.
 Replace Control Unit.

Sensor not activated and relay not energized:

LED "Störung K1/K2" (fault K1/K2) or "Betätigt K1/K2" (activated K1/K2) on.
> Sensor or supply lines faulty (Change in resistance not high enough).

 Check sensor with gauge: set value = 1.2 kΩ ±2%
 Actual value ≠ set value: sensor or supply line faulty.
 Replace sensor.

> Control Unit faulty.

 Connect resistor 1.2 kΩ instead of the sensor.
 Fault still exists: Control Unit faulty.
 Replace Control Unit.

Sensor interrupted and relay not de-energized:

> Control Unit faulty.

 Disconnect sensor.
 Relay not de-energized: Control Unit faulty.
 Replace Control Unit.

Maintenance

The Control Unit is maintenance-free.
Check safety system monthly by
activating the sensors.

Disposal

At the end of their service life, the devi­ces can be returned to us for disposal.
WEEE-Reg.-Nr. DE 39141253

Sensor actuated and relay not de-en­ergized:

> Control Unit faulty

 Disconnect sensor
 relay not de-energized: Control

Unit faulty

 Replace Control Unit.

Fault can still not be detected?
Mayser Support will help:
Tel. [phone]

Subject to technical modifications.

Mayser Polymer Electric Postfach 30 48 89020 Ulm Germany Tel. [phone] Fax [phone]

200409 v1.7