GE 8133-HI-TX 8-Channel Supervised AI with HART
8121-DI-DC
• 16 input channels
• For dry contact switches
• 24 V dc provided on input high side
• Returns commoned internally
• Pulse counting option
• 24 V dc bussed field power required
MODULE SPECIFICATION
See also System Specification
INPUTS
Number of channels
• 16
OFF current
• < 0.3 mA
ON current
• >1.2 mA
Wetting current
• 2.8 mA (typ.)
Minimum pulse width detected
• 5 ms
Max input freq in pulse counting mode (no-debounce)
• 100 Hz
Isolation
• Any channel to Railbus – 250 V ac
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 –
5 ms (max.)
SAFETY
FM non-incendive field wiring parameters
(each channel)
• Voc = 30 V; Isc = 3.5 mA; Ca
= 0.12 μF; La
= 1000 mH
POWER SUPPLIES
Railbus (12V) current
• 90 mA (typ.)
• 135 mA (max.)
Bussed Field Power
• 60 mA, @ 18–30 V dc
MECHANICAL
Module Key Code
• E1
Module width
• 42 mm
Weight
• 210 g

8129-IO-DC
• 8 inputs - any combination of inputs
and outputs
• Non-arcing inputs and outputs
• Output channels rated up to 2A
continuous
• Inputs for dry contact switches
• 24 V dc Bussed Field Power required
from 8914-PS-AC
MODULE SPECIFICATION
See also System Specification
Number of channels
• 8 (independently configured as inputs or outputs)
INPUTS
ON/OFF threshold current
• 0.9mA (typ.)
O/C Voltage
• 24V dc (typ.) - depends on BFP Supply
Wetting current
• 1.2mA (typ.)
Minimum pulse width detected
• 5ms
Max input frequency in pulse counting mode
(no debounce)
• 30Hz
Isolation (any channel to Railbus)
• 250V ac
OUTPUTS
Maximum Output Current per Channel
• 2A
Maximum Output Current per Module
• Continuous – 6A
• Non-continuous (<10 seconds) – 8A
INPUT CONFIGURABLE PARAMETERS
Filter time interval
• 0 to 8s (in 1ms steps)
Earth Leakage Detection Channel
• ON / OFF
Latch inputs
• Enable / disable
Latch polarity
• Latch on high / latch on low
Pulse counting
• Up transition / down transition / disable
Line fault detection
• None / open circuit / open & short circuit
OUTPUT CONFIGURABLE PARAMETERS
Output type
• Pulse / discrete / pattern
Pulse width
• 1ms to 60s
Line fault detection*
• Open line & short circuit detect /disable
RESISTANCE MEASUREMENT ACCURACY
(For normally de-energised output open and short-circuit detection)
With forward biased test current
• ±(3.4%+5.3Ω) for line resistance ≤ 220Ω
• Greater of: ±7% or ±(3.1%+27Ω) for line resistance
>220Ω, <1kΩ
With reverse biased test current
• Greater of: ±7% or ±(3.1%+430Ω)
RESPONSE TIME
I/P Signal change to availability on Railbus
• 5ms (max.)
Railbus command to O/P change
• 1ms (max.)
POWER SUPPLIES
Railbus (12V) current
• 50mA (typ.), 70mA (max.)
Bussed Field Power
• All channels configured as inputs – 50mA (max)
• Any channels configured as output – 50mA + o/p
load currents
MECHANICAL
• Module key code – B6
• Module width – 42mm
• Weight – 210g