Bender TM800, Руководство пользователя, Страница: 17 / 92

System description
17 TM800_D00165_00_M_XXEN/06.2015
3.4.4 Inputs and outputs
Digital inputs and outputs as well as relay outputs are available for the control and indication of dif-
ferent technical equipment. The I/O modules are controlled via I²C bus.
The digital inputs are designed for a voltage of AC/DC 0…30 V (HIGH=10…30 V; LOW=0…2 V). In
practice, these digital inputs are controlled via an internal or external voltage and potential-free con-
tacts (N/C or N/O operation, selectable). The voltage required for these inputs can be supplied by the
built-in power supply unit. The behaviour of the alarm contact at the digital input (N/O contact or N/
C contact) can be assigned via this PC software. That means that the hardware of the alarm indicator
and operator panel does not need to be changed in case of subsequent changes of the contact be-
haviour.
Digital inputs or outputs (potential free relay contacts or open collector outputs) are controlled by
warning or alarm messages, via operating and display modules or the digital inputs. A message, a
digital input or an illuminated pushbutton can be assigned to a relay output via the PC software
TMK-SET.
The I/O modules are snapped on a DIN rail in the flush-mounting box separately from the display and
the pushbutton panels. So the system can easily be expanded. Each input and output provides an
alarm LED so that the status is visible at a glance for the technical staff.
3.4.4.1 Digital output 1
When an I/O module BMI8/8, BMI8/4 or BMI0/4 is built in, the first output can be programmed indi-
vidually. It can be used for system functions (see "Settings menu 11: Relays" on page 65). The output
switches when:
– an internal TM800 device error is recognised
– the test button is pressed (relay will be activated for approx. 1.5 s)
– a device failure is recognised on the BMS bus,
– any warning or alarm message occurs (common alarm)
– the buzzer sounds (relay is activated when buzzer sounding)
The output can also be programmed via TMK-SET like all other outputs.
3.4.4.2 I/O modules
TM800 alarm indicator and operator panels offer safe separation according to
IEC 60664 between the relay contacts and the electronics, interface outputs, dig-
ital inputs and among each other.
Type Characteristics
BMI8/8 8 digital inputs, 8 open collector outputs
The open collector outputs are capable of driving a load of up to 15 W at an operating
voltage of 24 V. They feature flyback diodes for the connection of relays.