GE 8109-DI-DC 8-channel DI, 24Vdc isolated, sinking
8104-AO-IP
• 8 single-ended outputs
• 4–20 mA
• For I/P converters and remote
indicators, etc
• Open circuit detection is provided on
each channel
• 24 V dc bussed field power required
MODULE SPECIFICATION
See also System Specification
INPUTS
Number of channels
• 8, single-ended
Nominal signal range (span)
• 4 to 20 mA
Full signal range
• 1 to 23 mA
Open loop detection threshold
• 0.7 ± 0.25 mA
Output compliance
• 20 mA at 21.6 V dc supply (into 700 Ω load)
Accuracy (over temp range)
• ± 0.25% of span
Resolution
• 12 bits
Isolation
• Any channel to Railbus – 100 V ac
• Between channels – None
CONFIGURABLE PARAMETERS
Initialization state
• Predefined value
Drive on fail-safe
• Predefined value / last value
Channel status
• Active / Inactive
RESPONSE TIME
Response Time
• From Railbus command to output change –
25 ms (max.)
SAFETY
FM non-incendive field wiring parameters
(each channel)
• Voc = 28.7 V; Isc = 33 mA; Ca
= 0.17 μF; La
= 11.0 mH
POWER SUPPLIES
Railbus (12V) current
• 100 mA (typ.)
• 150 mA (max.)
Bussed Field Power
• 300 mA (max.) at 24 Vdc ± 10%
Quiescent current
• 60 mA
MECHANICAL
Module Key Code
• A4
Module width
• 42 mm
Weight
• 200 g

8109-DI-DC
• 8 discrete isolated inputs
• 24 V dc field voltage sources
• User definable input threshold
• Pulse counting option
MODULE SPECIFICATION
See also System Specification
INPUTS
Number of channels
• 8
OFF voltage
• < 3.2 V dc
ON voltage
• > 11 V dc
Wetting current
• 6.3 mA (nom.) @ 24 V dc
Minimum pulse width detected
• 3 ms
Maximum switching frequency (no-filtering)
• 200 Hz
Maximum voltage
• Input – 30 V dc
• Reverse input – -25 V dc
CONFIGURABLE PARAMETERS
Selectable input filter
• Fast, slow or user defined
(User defined permits 0 to 512 ms values in 2ms steps)
Latch inputs
• Enable / Disable
Latch polarity
• Latch on high / Latch on low
Pulse counting
• Enable / Disable
RESPONSE TIME
I/O response time
• Field event to new data available on Railbus –
3 ms (max.)
SAFETY
FM non-incendive field wiring parameters
(each channel)
• Vmax = 30 V; Imax = 100 mA; Ci
= 0 μF; Li
= 0 mH
POWER SUPPLIES
Railbus (12V) current
• 35 mA (typ.)
• 55 mA (max.)
Bussed Field Power
• Not required
MECHANICAL
Module Key Code
• B2
Module width
• 42 mm
Weight
• 170 g