The Honeywell 620-0038, also cataloged as the 620-0038 Control Network Module, operates as a dedicated hardware component for backplane bus communication and deterministic serial data routing within Honeywell IPC-620 Programmable Logic Controller racks.
Hardware Specifications
Parameter
Specification
Model
620-0038
Brand
Honeywell
Origin
United States
Weight
1.54 lbs (0.70 kg)
Dimensions
Standard IPC-620 Single-Slot Rack Module
Operating Temp
0 to 60 deg C
Power Consumption
5 VDC backplane powered, 1.2 A max
Module Type
Control Network Modules
Network Protocol
Honeywell IPC-620 Local Control Network Bus
Signal Isolation
Channel-to-channel optical isolation, 1500 VAC
Channel-to-Channel Isolation and Deterministic Network Routing
Designed to meet Honeywell DCS and programmable controller communication standards, the 620-0038 Control Network Module incorporates channel-to-channel optical isolation to prevent electrical ground loop noise from interfering with central processor backplane logic. The physical layer utilizes differential transmission drivers to stabilize high-speed packet transfer across local and expansion racks. Internal buffer registers and dedicated baud timing circuitry manage network packet synchronization, preventing communication timeouts under heavy industrial electromagnetic interference.
Frequently Asked Questions
Q: Can the Honeywell 620-0038 control network module be hot-swapped while the IPC-620 chassis is energized?
A: No, hot-swapping is strictly prohibited. Removing or inserting the module while backplane power is active can cause high-voltage transients, damage communication transceiver circuits, and interrupt active network loops.
Q: What grounding guidelines apply to the network communication cabling connected to the 620-0038?
A: Communication cable shields must be bonded to earth ground at a single point inside the enclosure. Dual-point grounding should be avoided to prevent ground loop currents from introducing noise onto data lines.
Field Installation Guidelines
Turn off all main 120/230 VAC power supplying the IPC-620 rack and connected network field wiring before starting mechanical installation.
Align the circuit board edges of the 620-0038 module with the card guide rails of the target slot in the IPC-620 rack.
Slide the card smoothly into the chassis until the edge connector fully engages the backplane motherboard socket. Secure top and bottom retaining screws to 0.6 Nm (5.3 in-lbs).
Route network cable connections through cable management channels, maintaining a clearance of at least 200 mm from high-voltage AC conductors.
Re-apply power to the rack chassis, verify that front-panel communication status LEDs show normal network initialization, and run standard backplane bus diagnostics.
