EN
- Overview
- Specifications
- Description
- Applications
- Features
- Chassis Ground Connections
- FAQ
- Recommended Products
Overview
Place of Origin: |
USA |
Brand Name: |
ICS TRIPLEX |
Model Number: |
T8846C |
Packaging Details: |
Original new Factory Sealed |
Delivery Time: |
5-7 days |
Payment Terms: |
T/T |
Supply Ability: |
In stock |
Specifications
|
Parameter |
Value |
|
Part Number |
T8846C |
|
Part Name |
Trusted Speed Monitor Input FTA |
|
Isolation Between Speed Groups 1, 2 & 3 |
50 V reinforced (continuous); 250 V basic (fault) |
|
Isolation (Chassis Ground to Speed Groups) |
Type tested at 2436 Vdc for 60 s |
|
Operating Temperature |
0°C to +60°C |
|
Storage Temperature |
-25°C to +70°C |
|
Temperature Change Rate |
±0.5°C/min |
|
Relative Humidity |
10–95% RH (non-condensing) |
|
Passive Input Resistance (A & B inputs) |
632 Ω |
|
Maximum Differential Input Voltage (Passive A/B) |
10 V |
|
Group Vfield Output Voltage |
22.6 Vdc (at 24 Vdc Vfield input, 50 mA load) |
|
Maximum Group Vfield Output Current |
62.5 mA |
|
Open Collector Pull-up Resistance |
2000 Ω to Group Vfield |
|
Maximum Open Collector Input Voltage |
33 V (with respect to Group Vfield return) |
|
Open Collector Input Resistance |
4990 Ω (input/output equivalent) |
|
Active Input Bias Voltage |
1.90 Vdc (referenced to Group Vfield return at 24 Vdc input) |
|
Group Vfield Input Voltage Range |
18 to 32 Vdc (A & B inputs relative to Group Vfield return) |
|
Maximum Group Vfield Input Current |
1 A |
|
Input Resistance (Passive A & B) |
632 Ω |
|
Dimensions |
10.2x39.1x12.7cm |
|
Weight |
0.75kg |
Description
The T8846C Trusted Speed Monitor Input Field Termination Assembly (SIFTA) is a DIN rail assembly. It provides the input field interface for three rotating machine groups when used as part of a Trusted T8442 Triple Modular Redundant (TMR) Speed Monitor system.
Applications
Large Chemical Plants: Precise compressor speed sensing with isolation for hazardous safety.
Combined Cycle Power Plants: Interfaces turbine speed probes for overspeed protection.
Steel Smelting Plants: Conditions speed signals with strong EMI immunity.
Gas Compression Stations: Collects speed pulses via open collector or magnetic sensors.
Offshore Oil Platforms: Monitors pump speed in harsh marine conditions.
Features
Provides all necessary input interfaces for a Trusted T8442 TMR Speed Monitor.
Nine speed input channels arranged as three groups of three inputs.
Separate field power inputs for each of the three speed input groups.
Field power and signal isolation between input groups.
Versatile input connectivity allows interfacing with
Active speed sensors with totem-pole outputs
Active speed sensors with open-collector outputs
Passive magnetic, inductive speed sensors
Standard DIN Rail mounting.
All fuses can be replaced in situ.
Chassis Ground Connections
Chassis ground plane is common across all speed input groups and monitor interfaces.
Each speed input cable shield should be connected to chassis ground at the assembly.
Each channel provides a terminal for shield-to-chassis grounding
The chassis ground must be connected to a local ground near the mounting location.
Two studs (TERM1 and TERM2) on the PCB are provided for this grounding connection.
FAQ
Q: What is the isolation level between speed groups in the T8846C speed monitoring terminal?
A: 50 V reinforced isolation between groups, 250 V basic fault isolation, and 2436 Vdc for 60 s chassis test.
Q: What is the maximum differential input voltage for passive sensors on the T8846C?
A: Supports up to 10 V differential input with 632 Ω resistance.
Q: What is the active sensor supply capability of the T8846C module?
A: 22.6 Vdc output at 24 Vdc input, 62.5 mA max per group.
Q: What pull-up resistor is used for open collector sensors in the T8846C?
A: 2000 Ω pull-up to Vfield, supports up to 33 V input.
Q: What temperature change limit applies to the T8846C module?
A: ±0.5°C/min, operating range 0°C to +60°C.
