GE 8142-DO-DC 16-channel Digital Output
8125-DI-DC• 32 input channels
• For Dry Contact Switches or
Proximity Detectors
• Pulse Counting and Latching Option
• 24 V dc bussed field power required
• Line fault detection on all inputs
(switch inputs need resistors)
MODULE SPECIFICATION
See also System Specification
Number of Channels
• 32
INPUT SPECIFICATION
OFF current
• <1.2 mA
ON current
• >2.1 mA
Short Circuit Current
• 8.6 mA (typ)
Output Resistance
• 950 Ω (typ)
Open Circuit output voltage
• 8.2V dc (typ)
Line Fault Detection
• Short Circuit – <100 Ω
• Open Circuit – <50 μA
Input voltage range without damage
• 0 to +12 V dc
Isolation
• Channel to Railbus – 250 V ac
Input sampling rate (all 32)
• 8 kHz
Input Pulse Width
• 250 μS (min)
DI Counting frequency without loss
• 500 Hz (max)
Applicable Specification
• NAMUR, DIN 19234
CONFIGURABLE PARAMETERS
Input Filter
• 0 to 8.192 secs in 250 μS steps
Pulse Counting
• On / Off
Latching
• On / Off
RESPONSE TIME
Input Module Scan Time
• <1 mS
(Inputs sampled at 8kHz and processed every 1 mS)
SAFETY
FM non-incendive field wiring parameters
(each channel)
• Voc ≤ 8.64 V; Isc ≤ 18.5 mA; Ca
≤ 28 μF; La
≤ 23.6 mH
POWER SUPPLIES
Railbus(12V) current
• <50 mA
Bussed Field Power
• 190 mA (max) at 24V dc
MECHANICAL
Module Key Code
• B3 Non Arcing
Module Width
• 42 mm
Weight
• 185 g

8115-DO-DC
• 8 powered outputs
• Controls solenoids and relays
• Common load supply of up to 60 V dc
• Discrete or pulsed outputs
• 1A per channel switched current
• 2–60 V dc bussed field power required
MODULE SPECIFICATION
See also System Specification
INPUTS
Number of channels
• 8
Output voltage range
• 2–60 V dc
ON voltage drop
• 0.25 V (max.)
OFF leakage current
• 1.0 mA (max.)
Switched current per channel††
• Continuous*
– 1 A
• For < 100 ms – 4 A
• For < 20 ms – 6 A
CONFIGURABLE PARAMETERS
Output initialisation state
• Predefined value
Fail-safe
• Predefined value / last value
Output
• Discrete, momentary or continuous pulse‡
Pulse width
• 2 ms to 130 s
RESPONSE TIME
Response time
• From Railbus command to output change –
1 ms (max.)
POWER SUPPLIES
Railbus (12V) current
• 45 mA (typ.)
• 70 mA (max.)
Bussed Field Power
• 2 to 60 V dc
MECHANICAL
Module Key Cod
• B6
Module width
• 42 mm
Weight
• 200 g