DS3800HHRB1D1D | GE Mark V High-Speed Counter Module

Description

Product Introduction

The DS3800HHRB1D1D is the high-speed counter board in the 1D1D configuration—locking spring-cage terminals and 2.5A fusing on both banks. This board counts pulses from encoders, flow meters, and high-frequency sensors with a 32-bit count value, and the locking terminals ensure reliable connections in high-vibration environments. The 2.5A fuses provide maximum headroom for long cable runs, and the 100kHz input frequency range covers most industrial counting applications. The 24V DC input capability matches modern encoders and sensors.

We’ve used the HHRB1D1D in a pipeline flow measurement application where the flow meter was located 300 meters from the control cabinet. The 2.5A fuses handled the cable capacitance without nuisance trips, and the locking terminals prevented intermittent connections caused by pipeline vibration. The 32-bit count allowed us to totalize flow over a 24-hour period without overflow, and the 100kHz input frequency handled the flow meter’s output with margin. The board’s performance was flawless.

Key Technical Specifications

Compatible Replacement Models

Frequently Asked Questions (FAQ)

Q: Why does the HHRB1D1D have 2.5A fuses on both banks?
A: The 2.5A fuses are for applications with long cable runs (over 100 meters) where cable capacitance can cause inrush currents on power-up. The 2.5A rating provides headroom for these inrush currents while still protecting the board from shorts. If you have a mix of short and long cable runs, the 1D1C (mixed 2.5A/1A) might be more appropriate.

Q: What’s the advantage of the locking terminals on the 1D suffix?
A: The locking terminals have a plastic latch that prevents the wire from pulling out under vibration. This is particularly important for counter inputs, where intermittent connections can cause missed pulses and counting errors. The locking mechanism is a simple but effective solution for high-vibration environments.

Q: Can I use the HHRB1D1D to count pulses from a flow meter?
A: Yes, the HHRB1D1D is ideal for flow meter pulse counting. The 32-bit count allows you to accumulate pulses over long periods without overflow, and the 100kHz input frequency handles most flow meter outputs. The 24V DC input matches standard flow meter outputs.

Q: What’s the maximum count value of the HHRB1D1D?
A: The HHRB1D1D has a 32-bit count, which provides a maximum value of 4,294,967,295 counts. At 100kHz, this would take over 11 hours to overflow. For most industrial applications, this is more than sufficient. If you need longer accumulation periods, you can read the count value periodically and reset it.

Q: How do I read the count value from the HHRB1D1D?
A: The count value is read by the Mark V controller via the backplane. The controller reads the 32-bit count value from the board’s registers. The specific register mapping is in GE’s application manual (GEI-100878). You’ll need to configure the Mark V to read the count values from the appropriate registers.

Q: Does the HHRB1D1D have conformal coating?
A: Not by default. The 1D1D suffix indicates locking terminals and 2.5A fusing, not coating. If you need conformal coating for harsh environments, look for a suffix with a “G” (e.g., DS3800HHRB1G1G). The standard HHRB1D1D is suitable for indoor environments. If your plant has high humidity or corrosive conditions, consider a coated variant.

Q: The HHRB1D1D has a 0.9A backplane current draw. Is that typical?
A: Yes, the 0.9A draw is typical for counter input boards. The Mark V power supply is rated at 6A on the 5V rail, so the HHRB1D1D is within the limit. If your rack has multiple HHRB boards, check your total backplane current. We recommend keeping total backplane current below 5.5A for margin.

GE DS200TCQAF1AFC
GE DS200TCQAF1AFE
GE DS200TCQAF1AFF