DS3800HIMA1B1B | Full Suffix Mark V High-Density Analog Card

Description

Product Introduction

The DS3800HIMA1B1B is the high-density analog input board with spring-cage terminals and 0.8A fusing on both banks. This board brings 16 analog input channels into a single Mark V slot, and the spring-cage terminals significantly reduce termination time compared to screw-clamp. The 0.8A fuses provide more headroom than the 0.5A fuses on the baseline variant, reducing nuisance trips on long cable runs or transmitters with higher inrush. The board’s 12-bit resolution and per-channel configurability make it suitable for a wide range of analog input applications.

We’ve used the HIMA1B1B in a new installation where wiring speed was a priority. The spring-cage terminals saved about 30 minutes per board compared to screw-clamp, which added up to significant time savings across multiple boards. The 0.8A fuses gave us confidence that the board would handle the inrush from the long cable runs to the field transmitters. The board’s 16-channel capacity allowed us to monitor all the required analog signals in a compact footprint.

Key Technical Specifications

Compatible Replacement Models

Frequently Asked Questions (FAQ)

Q: What’s the advantage of the spring-cage terminals on the 1B1B?
A: Spring-cage terminals use a stainless steel spring to grip the wire—push the wire in and it’s locked. This is faster than screw-clamp (which requires a screwdriver and torque control). Spring-cage is also more resistant to vibration loosening. The 1B1B is the preferred choice for new installations where wiring speed matters.

Q: Does the HIMA1B1B require ferrules for stranded wire?
A: Yes, we strongly recommend ferrules for stranded wire with spring-cage terminals. Stranded wire without a ferrule can splay under spring pressure, leading to intermittent connections. Ferrules provide a solid, round profile that the spring grips uniformly. Use ferrules or solid wire for reliable terminations.

Q: Can I mix 4-20mA and 0-10V signals on the same HIMA1B1B board?
A: Yes, the HIMA1B1B allows per-channel configuration via jumpers. Each channel has a jumper block that selects current or voltage mode. The board supports 4-20mA, 0-20mA, 0-10V, and ±10V inputs. Make sure to set the jumpers correctly for each channel before installation.

Q: What’s the scan rate of the HIMA1B1B?
A: The HIMA1B1B scans all 16 channels in about 25ms. The scan rate is the same as the 8-channel HCMA, despite having twice the channels. This is because the HIMA uses a multiplexed ADC that cycles through the channels at high speed.

Q: Does the HIMA1B1B provide loop power for 4-20mA transmitters?
A: No. The HIMA1B1B does not provide loop power. You’ll need an external 24V DC power supply for the transmitter loops. The board’s 250Ω input impedance is compatible with most 4-20mA transmitters. If your transmitter requires a specific loop resistance, check the transmitter’s data sheet.

Q: The HIMA1B1B has a 1.2A backplane current draw. Is that typical for a 16-channel analog board?
A: Yes, the 1.2A draw is typical for a 16-channel analog input board. The Mark V power supply is rated at 6A on the 5V rail, so the HIMA1B1B is within the limit. If your rack has multiple HIMA boards, check your total backplane current. We recommend keeping total backplane current below 5.5A for margin.

Q: Does the HIMA1B1B have conformal coating?
A: Not by default. The 1B1B suffix indicates spring-cage terminals and 0.8A fusing, not coating. If you need conformal coating for harsh environments, look for a suffix with a “G” (e.g., DS3800HIMA1G1G). The standard HIMA1B1B is suitable for indoor environments. If your plant has high humidity or corrosive conditions, consider a coated variant.

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