3
73.976 | 09.47
EN
Introduction
Steca STM 80, STM 81, STM 860 and STM 861 are battery chargers for lead-
acid batteries. The main areas of application are battery charging rooms, work-
shops, depots, and the power supply of car parks.
Steca STM 80, STM 81, STM 860 and STM 861
ensure a high battery service
life and minimum recharging times by means of a microprocessor-controlled
charging process.
The series of battery chargers covers the following variants:
Output voltage 1 V, 4 V, 36 V or 48 V.
Setting of the battery capacity via a potentiometer or via menu-driven but-
tons with LCD display (exception: STM 860)
Casing protection degrees IP 0 or IP 65
Type
Output voltage
Output current
Control element
Protection
degree
STM 820
1 V/50 A
1 V
50 A
Potentiometer
IP 0
4 V/35 A
4 V
35 A
36 V/5 A
36 V
5 A
48 V/18 A
48 V
18 A
STM 821
1 V/50 A
1 V
50 A
LCD display
IP 0
4 V/35 A
4 V
35 A
36 V/5 A
36 V
5 A
48 V/18 A
48 V
18 A
STM 860
1 V/50 A
1 V
50 A
IP 65
4 V/35 A
4 V
35 A
36 V/5 A
36 V
5 A
48 V/18 A
48 V
18 A
STM 861
1 V/50 A
1 V
50 A
LCD display
IP 65
4 V/35 A
4 V
35 A
36 V/5 A
36 V
5 A
48 V/18 A
48 V
18 A
•
•
•
1 About this manual
These operating instructions are part of the product.
Read these operating instructions carefully before use,
keep them near the product during its entire service life,
and pass them on to any future owner or user of this product.
1.1 Applicability
These instructions describe the function, operation, installation and dismantling
of the battery chargers.
1.2 Users
These operating instructions are intended for end customers. A technical expert
must be consulted in cases of uncertainty.
1.3 Description of symbols
1.3.1 The structure of the warning notices
SIGNAL WORD
Type, source and consequences of the danger!
Measures for avoiding danger
1.3.2 Danger levels in warning notices
Danger level
Probability of occurrence
Consequences of non-compliance
DANGER
Imminent threat of danger
Death, serious bodily injury
WARNING
Possible threat of danger
Death, serious bodily injury
CAUTION
Possible threat of danger
Minor bodily injury
CAUTION
Possible threat of danger
Property damage
