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9 Digital Output Modules
Digital output modules (DO) receive output values from the gateway via the internal module bus.
The modules convert these values and transmit the corresponding high or low level signals for each
channel to the field level via the base modules. The outputs are rated according to EN 61 131-2 Type
2. The module bus electronics of the digital output modules are galvanically isolated from the field
level via an optocoupler.
The digital output modules are not be parameterizable.
9.0.1 LED status indicators
Channel statuses are indicated by LEDs. Error signals from the I/O level are indicated by each mod-
ule via the ”DIA” LED. The corresponding diagnostic information is transmitted to the gateway via
diagnostic bits. A continuously lit up red ”DIA” LED indicates the failure of the module bus commu-
nication at the digital input module.
9.0.2 Module overview
ATTENTION
High voltages when disconnecting inductive loads
Destruction of electronics!
† Provide an external suppressor.
Number of
channels
positive
switching
negative
switching
Output current,
max.
galvanically
isolated
BL20-2DO-24VDC-0.5A-P 2 0,5 A
BL20-2DO-24VDC-0.5A-N 2 0,5 A
BL20-2DO-24VDC-2A-P 2 2 A
BL20-4DO-24VDC-0.5A-P 4 0,5 A
BL20-E-8DO-24VDC-0.5A-P 8 0,5 A
BL20-16DO-24VDC-0.5A-P 16 0,5 A
BL20-E-16DO-24VDC-0.5A-P 16 0,5 A
BL20-E-16DO-24VDC-0.5A-N 16 0,5 A
BL20-32DO-24VDC-0.5A-P 32 0,5 A
BL20-2DO-120/230VAC-0.5A 2 0,5 A
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