Tfio Expansion Interfaces; Table 2-9: Digital Input And Output Specifications - ABB RMC-100 User Manual

Table 2-9 provides the digital input and output specifications. For specific pinout information, see
section 3.5.5.4, Digital input and output

Table 2-9: Digital input and output specifications

Electrical specification
(each point)
DI/DO voltage
DI Vlow threshold
DI Vhigh threshold
DI Vpullup
DI Iminsink
DI/DO Rinput
DI/DO Ileakage
DI/DO shielding
DI/DO Vtvs
DO type
DO Vdoutoc
DO Idoutcont
DO Idoutpulsed
DO RdoutmaxON
2.2.4

TFIO expansion interfaces

The RMC provides expansion interfaces to add modular I/O. The RMC has two TFIO interfaces, TFIO A
and TFIO B. Each TFIO interface supports up to 22 TFIO modules (44 total).
The RMC uses two independent buses to communicate with the modules. ABB Totalflow devices have
an I/O protocol to exchange information with the modules. The buses operate in a master/slave
mode, with the main device board acting as master.
The TFIO modules are DIN rail mountable and employ contact technology for field wiring. The modules
interconnect with each other to provide the necessary power and interface signals along the bus.
IMPORTANT NOTE: The RMC does not support the TFIO CIM module. The RMC supports the
modules labeled for use with 24 Vdc.
All modules have four LED lights, a manual reset button, and a selectable address from zero through
seven (Figure 2-9). On the faceplate of each module is:
–
Type of module
–
LED light panel
–
Reset button
–
Module address selector
For additional information, refer to the TFIO Module User Manual. See
to the manual.
2 2 | R MC-1 00 | 2 10 55 5 2MN A E
pinouts.
Description
Voltage range for both input and output modes
Maximum voltage threshold for detecting a closed
input configurable in system
Minimum voltage threshold for detecting an open
input configurable in system
Open circuit voltage on input with DI 10 K pull-up
enabled
Minimum external sinking current required to
detect closed input with DI 10 kΩ pull-up enabled
Input impedance to GND of DI/DO with DO open
Short circuit leakage current with DI 10 kΩ pull-up
enabled
Shielded signal pairs, shielded to prevent spurious
signals
Each DI/DO point has onboard TVS protection,
typical V threshold level to begin conducting.
Output type
Open circuit voltage
Maximum continuous sink current
Maximum pulse current
Max on resistance of MOSFET OD output to GND
Value or range
0 – 30 Vdc
0.8 Vdc default,
configurable
(0-30 Vdc)
2.4 Vdc default,
configurable
(0-30 Vdc)
3.4 Vdc +/- 0.3 Vdc
0.2 mA
75k Ω nominal
450 µA typical
Not applicable
32 Vdc typical
FET open drain (OD)
0 Vdc
2 Adc
3 Adc for 5 seconds
0.1 Ω
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