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Remote device KFM 903A50

903A50

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Display for relay function
Descriptive text for relay function
Digital values and descriptive text displays
Unit of display
Key for setpoint and parameter mode
Setpoint adjustment

F903-tft110202

1

2

5

6

Vorlauf / Supply

Rücklauf / Return

B

Brenner -

Grundlast

RL-Min-Alarm

VL-Max-Alarm

Kaltstart-Begr.

Sollwert

General:

With remote devices 903A50 controller types 903 / 93 with option 99sre can be remotely operated, i.e. all
operations can take place at the controller as well as at the remote control device resp. all indications are
visible on both.

In the attempt of simultaneous operation the device which was operated first has priority. At this device the
operation can be continued normally, at the other device the operation is blocked. But at any time on the
displays of both devices identical contents are indicated. After the used menu level of the prior device has
been left, operation is possible at both devices.

Depending on type, keys can be integrated in the remote device or routed to the terminals for connecting
external keys.

The connection to the controller with option 99sre is realised by a patch cable. The remote device can be
connected in a maximum distance up to 100 m.

Types

Li.No.

Remote device standard version, power supply 100...250V AC

903A500

Remote device standard version, power supply 24V DC

903A508

Flow chart: (Examples, single remote device           /           two remote devices connected via a switch.)

controller 9..sre

remote device

patch cable

(CAT 5e)

°

°

285
282

Supply

Return

F903-tft110202

Vorlauf / Supply

Rücklauf / Return

B

Brenner -

Grundlast

RL-Min-Alarm

VL-M ax-Alarm

Kaltstart-Begr.

Sollw ert

Vorlauf / Supply

Rücklauf / Return

B

Brenner -

Grundlast

RL-Min-Alarm

VL-M ax-Alarm

Kaltstart-Begr.

Sollw ert

controller 9..sre

remote device

patch cable

(CAT 5e)

°

°

285
282

Supply

Return

F903-tft110202

Vorlauf / Supply

Rücklauf / Return

B

Brenner -

Grundlast

RL-Min-Alarm

VL-M ax-Alarm

Kaltstart-Begr.

Sollw ert

Vorlauf / Supply

Rücklauf / Return

B

Brenner -

Grundlast

RL-Min-Alarm

VL-M ax-Alarm

Kaltstart-Begr.

Sollw ert

Vorlauf / Supply

Rücklauf / Return

B

Brenner -

Grundlast

RL-Min-Alarm

VL-M ax-Alarm

Kaltstart-Begr.

Sollw ert

switch

Note: Interface connections must be laid out
with shielded and twisted cables of category 5
or better (CAT5e)!

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