Ahlborn ALMEMO 2590-2A Operating Instructions Manual page 69

In the menu OUTPUT MODULES the elements of
the output modules can be individually selected
and functions programmed as follows :
First select the port by pressing :
e.g. port 0 at socket A2 (port address 20):
The element concerned is recognized :
Relay type NO (normally open) :
Relay type NC (normally closed) :
Relay type (changeover):
The relay switching mode can be configured on the following variants;see 9.5 :
0: Alarm, if one channel of all is faulty
2: Alarm of a programmable channel
3: Alarm, if one limit value - max of all is overshot 3: Summated alarm - max
4: Alarm, if one limit value - min of all is undershot 4: Summated alarm - min
8: Relay driven via interface or keypad
Variant 2 ´Assigned internally´ also requires the assignment of relays to cer-
tain limit values; (see 13.12.2).
For the purposes of detecting power failure it is an advantage if relays are
driven on an inverted basis; without current an alarm status applies automati-
cally. The function variants are therefore also provided on an inverted basis.
Inverted relay control
e.g. variant 2 inverted :
The activation mode and actual contact status resulting from relay type and driv-
ing mode are displayed in the next line.
Activation mode and relay contact status :
Relay variant 8 ´Driven externally´ permits manual activation via the keypad or
via the interface; (see Manual 6.10.10).
Relay variant 8:
For manual activation of relays press :
Trigger inputs
For the purpose of controlling the measuring se-
quence 2 trigger inputs are provided at ports 8 and
9 (keypad or optocoupler). The trigger source
"key" and / or "optocoupler" can be configured ini-
tially
keys ,
PROG ▲
function can, for safety purposes, be switched off
altogether by means of "OFF".
:
by
/ and
▼ PROG
<P> :
▲
Port: 20
Relay
Relay : NO (normally open)
Relay : NC (normally closed)
Relay : Changeover
0: Summated alarm
2: Assigned internally
-2: Assigned internally - Inverted
Status : active open
8: Driven externally
<ON>
pressing
or the trigger
15. Output modules
or
▼
8: Driven externally
<OFF>
or
69