4
Operating instructions
Safety-monitoring module
AES 1185
EN
AES 1185 - DC devices
Monitoring of three safety guards by means of position switches with
safety function
A1
S13
S14
S22
X1
13
24 VDC
K3
K4
S1
L1
S
A
S2
S3
K1
K2
14
A2
S14
S22
S14
S22
OV
N
3
M
K3
K4
A
A
AES 1185.3 - AC devices
Monitoring of three safety guards by means of one magnetic safety
sensor (BNS)
AES 1185
A1
S13
14
A2
S14
S22
S14
S22
3
S14
S22
X1
13
24 VAC
N
N
M
K1
K2
K3
K3
K4
K4
S1
S2
S3
L1
24 VDC
S
Key
A
Positive break
H
Start button
P
Actuated
A - C
S
Non-contact safety sensor
8.2 Integral System Diagnostics (ISD)
The LED indication of the safety-monitoring modules shows the
different switching conditions and errors. The following tables show the
different switching conditions.
Tables switching condition indication
Diagnostic LED
System condition
The LED is green.
Enabling paths closed
LED flashes green
Enable delay time running,
enabling paths opened
LED flashes yellow (2 Hz) Feedback circuit is open
If a safety guard is opened, the LED indication changes.
Indication (yellow) LED
System condition
1 impulse
Safety guard 1 open
2 impulses
Safety guard 2 open
3 impulses
Safety guard 3 open
Table error indications
Indication (orange)
LED
Error
Cause
1 impulse
Error safety guard 1 Defective supply
voltage lead, defective
switch, erroneous
fitting of the switch;
switch only partially
actuated* for at least 5
s; cross-wire short
2 impulses
Error safety guard 2 Refer to Error safety
guard 1
3 impulses
Error safety guard 3 Refer to Error safety
guard 1
5 impulses
One or both relays
did not close within
the monitoring time
Too low operating
voltage U
e;
Defective relay
6 impulses
Relay not disabled
upon the actuation
of the switch
May be due to contact
welding
7 impulses
Interference signals
at the inputs (no
safe evaluation
assured)
Too high capacitive or
inductive interference
at the input signal
* Partial actuation: position of the switch, in which only one contact was actuated.
Deleting the error message
The error message is deleted once the fault has been rectified and after
the connected switch has been actuated to check the various functions
(open and then close the safety guard).
