The Honeywell TBCH, also cataloged as the TBCH 36 Pin Terminal Block, operates as a dedicated hardware component for field wiring termination and signal routing execution within Honeywell process automation platforms.
Hardware Specifications
Parameter
Specification
Model
TBCH
Brand
Honeywell
Origin
USA
Weight
0.10 kg (0.22 lbs)
Dimensions
Standard I/O Module Terminal Block Footprint
Operating Temp
-40 to +70 deg C
Power Consumption
Passive wiring interface (0 Watts)
Terminal Pin Count
36 positions
Wire Size Range
1 wire @ 16-22 AWG (0.64-1.30 mm)
Material
High-quality, fire-resistant plastic housing
Connection Type
Compression screw-clamp terminal interface
Channel-to-Channel Isolation & Signal Interface Performance
Designed for high-density I/O wiring, the TBCH terminal block routes up to 36 discrete signal and sensor channels directly to process module backplanes. The fire-resistant housing provides physical channel-to-channel isolation, preventing signal cross-talk and short circuits when terminating 4-20 mA HART transmitters or low-voltage DC logic circuits. Screw-clamp terminals accommodate wire sizes ranging from 16 to 22 AWG, maintaining low contact resistance across high-vibration control panel installations.
Frequently Asked Questions
Q: What wire gauge specifications are supported by the compression terminals on the TBCH?
A: The TBCH terminal block supports single-conductor field wiring ranging from 16 to 22 AWG (0.64 mm to 1.30 mm diameter).
Q: How does the TBCH contribute to channel isolation on field I/O connections?
A: High-dielectric, fire-resistant plastic barriers between adjacent terminals prevent physical contact and maintain channel-to-channel isolation under maximum working voltages.
Field Installation Guidelines
Verify that all field power feeds and system backplane power are fully isolated before wiring the TBCH block.
Strip field conductor insulation back 6 to 8 mm, taking care not to nick or nick the copper strand core.
Insert each conductor (16-22 AWG) fully into the designated terminal position and torque the terminal screw to 0.5 Nm.
Route individual cables through cabinet wire ducts to prevent physical tension on the 36-pin header assembly.
Secure field cable shields to the cabinet ground bar at a single grounding point before plugging the TBCH assembly into the active module base.
