GELBAU 252.0 Z Series Quick start guide
14_252_0xZ 12 March 2014
GELBAU GmbH & Co. KG phone: +49 2208 / 9455-0 FAX: 9455-99 www.gelbau.com page -1-
Original operation manual –Safety relay 252.0xZ
General
The resistance evaluation unit 252.0xZ is a dual safety relay designed to monitor GELBAU Contact-Duo safety
switching strips with a resistance of 8.2 kΩas an electrical termination. The 252.0xZ model series has a two-
channel configuration and incorporates a control which monitors redundancy. The stop output (13, 14) comprises
two force guided relays.
With an additional changeover contact (21, 22, 24), a notification contact or auxiliary contact is available.
The safety system complies with the EN ISO 13849-1: 2008 standard and the EN ISO 13856-2: 2013 European
standard for pressure-sensitive protective devices as it applies to output switchgear.
Arrangement, connection Wiring diagram
Function
The Contact-Duo switching strip connected to Z1, Z2 is monitored with a quiescent current. If correctly wired, the
safety contact 13, 14 is closed and both green LEDs are illuminated in the operating state “Ready”.
If the Contact-Duo switching strip is actuated (compressed), both safety relays K1 and K2 assigned to it drop out
and safety contact 13, 14 is opened. The red LED is illuminated.
If the quiescent current circuit between Z1, Z2 is interrupted, the yellow LED lights up. Safety contact 13, 14 is
opened.
The additional changeover contact 21, 22, 24 switches simultaneously with the STOP contact and may not be
used in the safety circuit!
Function table (status display)
Status of the switching strip
Red LED
Yellow LED
Green LED(2x)
Output
13, 14
Properly connected;
non-actuated status
illuminated
closed
actuated (compressed)
illuminated
open
Switching strip interrupted
illuminated
open
A1
13
A2
14
24
21
22
Z1
Z2
8K2
Contact
Profile
bn
(bu)
wh
252.0xZ
4A
b
a
22212413
K3
14
K1
K2
Stop
Switching strip
+DC -
AC
A2A1
Supply
voltage
Z1Z2
Swiching strip
8k2
(bu)
wh
bn
Additional contact
F1
4A
14_252_0xZ 12 March 2014
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Original operation manual –Safety relay 252.0xZ
Installation, commissioning
1. Designed for electrical cabinet installation, the housing snaps into a 35 mm top hat rail (TS 35) in accordance
with DIN 50022. If control panel installation is desired, a 26-mm-wide top hat segment with two mounting
holes for screwed fasteners is available.
2. The Gelbau Contact-Duo switching strip(s) with terminating resistor is (are) connected to terminals Z1 and Z2.
Note that the brown conductor of the connection cable must be connected to Z1 and the white (blue)
conductor of the connection cable must be connected to Z2. When multiple Contact-Duo switching strips are
connected to resistance evaluation unit 252.0xZ, the individual switching strips must be connected in series
(Note: Wire the conductors brown-to-brown and white-to-white, otherwise malfunctions can occur), whereby
the resistor may only be installed as an electrical termination on the last switching strip.
3. The load applied to safety relay output 13, 14 may not exceed 4 A, because a 4 A slow-blow pre-fuse is
installed.
For changeover contact 21, 22, 24 the specified switching capacities must be observed (see “Technical
data”).
4. The supply voltage is connected to A1 and A2. The (+) pole must be attached to A1.
Troubleshooting and corrective measures
1. no LEDs light up
Is the supply voltage correct?
2. the yellow LED is continuously illuminated
Is the associated switching strip connected correctly or is there an interruption/break in the supply line? (Test:
Connect an 8.2 kΩresistor across Z1 and Z2 temporarily. If device is then OK Interruption/break.)
3. the red LED is continuously illuminated
Disconnect switching strip and check switching strip with ohmmeter (value must be about 8.2 kΩ); possible
short circuit in the supply line?
4. only one of the green LEDs is dimly illuminated
Actuate profile strip for approx. 2 seconds or switch off mains for approx. 5 seconds. If system still does not
operate correctly thereafter send device back for inspection.
The device may be installed and commissioned only by specialists with the relevant
qualifications.
14_252_0xZ 12 March 2014
GELBAU GmbH & Co. KG phone: +49 2208 / 9455-0 FAX: 9455-99 www.gelbau.com page -3-
Original operation manual –Safety relay 252.0xZ
Technical specifications
Housing:
Material: Polyamide 6.6-RF
Protection class: IP20
Dimensions: 45 x 75 x 120 mm (W x H x D)
Snap system for 35-mm TS
mounting rail according to DIN EN
50022
Weight: 390 g
AC connection voltages:
Model: 252.00Z:
Nominal operating voltage: 230 VAC -15% +10%
Nominal frequency: 50 Hz 40 - 60 Hz
Model: 252.01Z:
Nominal operating voltage: 115 VAC -15% +10%
Nominal frequency: 50 Hz 40 - 60 Hz
Model: 252.04Z:
Nominal operating voltage: 24 VAC -15% +10%
Nominal frequency: 50 Hz 40 - 60 Hz
Power consumption: max. 3VA
Power supply VDE 0551 galvanically isolated
DC connection voltages:
Model 252.06Z:
Nominal operating voltage: 24 VDC -15% +10%
Permissible residual ripple: max. 10%
Power consumption: max. 3W
Power supply galvanically isolated (DC/DC converter)
Technical details subject to change
Switching strip input (Z1, Z2):
Terminal voltage upon interruption: 8 VDC
Terminal voltage upon actuation: < 4 VDC
Terminal voltage in non-actuated state: approx. 5 VDC
Sensor quiescent current: approx. 0.6 mA
Switch point upon actuation: < 5.5 kΩ
Switch point upon interruption: > 11.5 kΩ
Switching strip termination: 8.2 kΩ resistor
max. connectable switching strip length: 100 m
max. connecting cable length: 50 m
min. cross-section of the connection cable: 0.5 mm2
Safety relay terminals 13, 14:
Type of contact two relays with 1 NOC each
in series
-force guided-
Loading capacity max. 4 A (integrated slow-
blow 4 A fuse)
Drop out time: Delay between actuation of switching strip
and relay signal output: max. 15 ms
Relay contact data (13, 14):
Nominal operating current
NOC 2A DC13 24V
NOC 3A AC15 250V
According to the IEC947-5-1 standard
Relay contact data (21, 22, 24):
Nominal operating current
NCC 1.25A DC13 24V
NOC 1.25A DC13 24V
NCC 2A AC15 250V
NOC 2A AC15 250V
According to the IEC947-5-1 standard
Contact service life mech.: 3 x 107
switch cycles
Contact service life electr.: 2 x 105
switch cycles
at max. power
Permissible temperature range: -20° to + 55° C
Acoustic noise: < 35 dB (A)
Category: 3
Standards:
Accepted according to: -EN ISO 13849-1: 2008
Performance Level: PL: e
Accepted according to: -EN 62061: 2005
Safety Integrity Level: SIL: 3
14_252_0xZ 12 March 2014
GELBAU GmbH & Co. KG phone: +49 2208 / 9455-0 FAX: 9455-99 www.gelbau.com page -4-
Original operation manual –Safety relay 252.0xZ
EC Conformity Declaration
according to 2006/42/EC, Annex II, no. 1 A
Manufacturer: Gelbau GmbH & Co. KG
Grandkaule 8 –10
53859 Niederkassel, Germany
Ms. Yvonne Riem is duly authorised to compile the Ms. Yvonne Riem
technical documentation. Gelbau GmbH & Co. KG
Grandkaule 8 –10
53859 Niederkassel, Germany
We hereby declare that the type of the following safety relays:
252.0xZ
serial numbers: 0011 to 9999....
meets the requirements of Performance Level “e” / Category 3 according to EN ISO 13849-1: 2008 and Safety
Integrity Level (SIL) 3 according to EN 62061: 2005 and conforms to all applicable provisions of the EC
Machine Directive 2006/42/EC.
The type of the safety relays is also in conformance with all applicable provisions of the
following EC directives: EMC Directive 2004/108/EC
Notified body: TÜV NORD CERT GmbH
ID number: 0044
Am TÜV 1
30519 Hanover, Germany
EC type examination certificate no.: 44 205 10 378898
The following harmonised standards were applied:
EN ISO 13849-1:2008 Safety of machinery - Safety-related components of control systems, requirements relative to
Performance Level
EN 62061:2005 Functional safety of safety-related electrically / electronically / programmable requirements relative
to SIL
EN ISO 13856-2: 2013 “Pressure-sensitive protective devices” in sub-areas, relative to the output switching system
EN 60947-1:2004 Low-voltage switching devices –Part 1: General rules
EN61000-3-2:4/2006 Electromagnetic Compatibility (EMC)
+A1:7/2009+A2:7/2009
EN 61000-3-3:9/2008 Electromagnetic Compatibility (EMC)
EN 61000-6-2:2005 Electromagnetic Compatibility (EMC) Part 6-2: Generic standards –Immunity for industrial
environments
EN 61000-6-3:1/2007 Electromagnetic Compatibility (EMC) Part 6-2: Generic standards –Emission standard for
residential, commercial and light industrial environments
Notes:
The user may opt to interconnect switching strip profiles/evaluation unit combinations by means of a Pepperl & Fuchs model Z965/071859
Zener barrier.
Niederkassel, 04.11.2015
Jürgen Menz
General Manager
