L4AS
P. 3 / 3 EM-1991 Rev.6
CHECKING
1) Terminal wiring: Check that all cables are correctly
connected according to the connection diagram.
2) Power input voltage: Check voltage across the terminal 9
–␣ 10 with a multimeter.
3) Input: Check that the input signal is within 0 – 100% of
the full-scale.
4) Relay operation: Confirm that each relay trips properly
according to the figure below.
5) Output load: Check that the output load is 380V AC/
100VA or 125V DC/30W at the maximum. For maximum
relaylifewithinductiveload,externalprotectionisrecom-
mended.
ALARM RELAY OPERATIONS
• Trip operation in power failure: terminals 3 – 5, 6 –␣ 8, 11 –
13, 14 – 16 turn ON.
POINTS OF CAUTION
■ GENERAL
• Before you remove the unit or mount it, turn off the power
supply and input signal for safety.
■ ENVIRONMENT
• When heavy dust or metal particles are present in the air,
install the unit inside proper housing and ventilate it.
• Do not install the unit where it is subjected to continuous
vibration. Do not apply physical impact to the unit.
• Environmental temperature must be within -5 to +55°C (23
to131°F)withrelativehumiditywithin30 to 90% RH in order
to ensure adequate life span and operation.
■ WIRING
• Do not install cables (power supply, input and output) close
to noise sources (relay drive cable, high frequency line, etc.).
• Do not bind these cables together with those in which noises
are present. Do not install them in the same duct.
■ AND ....
• The unit is designed to function as soon as power is
supplied, however, a warm up for 10 minutes is required for
satisfying complete performance described in the data sheet.
MAINTENANCE
Regular calibration procedure is explained below:
■ CALIBRATION
Warm up the unit for at least 10 minutes.
• Hi or HH Setpoint
Increasetheinputsignal from a value lower than the setpoint
and check that the trip point remains within the accuracy
described in the data sheet.
• Lo or LL Setpoint
Decrease the input signal from a value higher than the
setpoint and check that the trip point remains within the
accuracy described in the data sheet.
When the trip points are out of tolerance, contact M-System’s
Sales Office or local representatives.
0 50 100
Input
(%) No.1 No.2 No.3 No.4
Output 1
(3–5)ON (3–4)ON
Output 2
(6–8)ON (6–7)ON
Output 3
(11–13)ON
Output 4
(11–12)ON
(14–15)ON
(14–16)ON
•Output Code : 1
0 50 100
Input
(%) No.1
(LL) No.2
(L) No.3
(H) No.4
(HH)
Output 1
(3–4)ON (3–5)ON
Output 2
(6–8)ON
(6–7)ON
Output 3
(11–13)ON
Output 4
(11–12)ON
(14–15)ON
(14–16)ON
•Output Code : 2
Rugghölzli 2
CH - 5453 Busslingen Tel.+41 (0)56 222 38 18
Fax +41 (0)56 222 10 12 mailbox@sentronic.com
www.sentronic.com
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