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Product short description:
  • 2 channels, ±625mV, 0-10V DC (selectable ranges) input
  • 4 to 20mA DC output
  • 12-50V DC power from output loop
  • Dual-channel transmitter with push-button calibration
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These units accept DC voltage input signals, provide isolation, and output proportional DC current signals. With two independent I/O channels in a slim package, the 654T is ideal for panel shops and end-users who require a high-density signal conditioner that can cover a broad range of measurement applications.

Configuration is fast and easy. First, you select the input range for each channel with simple DIP switches. Then, you set your zero/full-scale output values using the non-interactive increase/decrease toggle switches on the front panel to modify the output signal until the desired output value is read on your voltmeter. The switches make it easy to calibrate a normal proportional) or reverse-acting (inverse) response in seconds. After setting the desired calibration, you can engage the safety lockout feature on the DIP switch to prevent accidental changes and
unauthorized tampering.

The 654T provides two independent high-voltage input isolation circuits. Loss of power or a failure on one channel has no effect on the other. The second channel can be used as a built-in spare for reduced downtime should the first channel fail. The spare channel becomes operational by simply moving the wired terminal block over to the vacant channel.

Input Ranges:
Bipolar: ±78mV to ±625mV (selectable ranges)
Unipolar: 0–1.25 to 0–10V DC (selectable ranges)

Output Range: 4 to 20mA DC

Power Requirement:
12 to 50V DC (loop-powered)
Two-wire transmitter

Approvals:
UL, cUL listed
Class I; Division 2; Groups A, B, C, D

Performance Specifications

General Input

Analog to Digital Converter (ADC): 16-bit Σ-Δ A/D converter
Noise Rejection:
Normal Mode: Better than 40dB @ 60Hz with 100 ohm input unbalance.
Common Mode: Better than 140dB @ 60Hz with 100 ohm input unbalance.
Input Over-voltage Protection: Bipolar Transient Voltage Suppressors (TVS)

DC Voltage Input

Input Range
DIP switch-selectable. See table below.
Input                        Recommended
Range                  Minimum Span (10%)
A) ±78mV                          15mV
B) ±156mV                        31mV
C) ±313mV                        62mV
D) ±625mV                     124mV
E) 0 to 1.25V                  125mV
F) 0 to 2.5V                     250mV
G) 0 to 5V                        500mV
H) 0 to 10V                   1000mV
Span adjust: See table above.
Zero adjust: 100% full range

Input Impedance: 110K ohms, typical

Output

Output Range: Range: 4 to 20mA DC, 3.8 to 24mA range typical.
Output Compliance:
Rload = (Vsupply – 12V) / 0.02A
600 ohms at 24V DC supply
Output Response Control: Proportional/inverse selectable.
Ambient Temperature Effect: Better than ±0.018% of input span per °C (±0.01% per °F)
Output Resolution: Output resolves to 1 part in 6546 for the nominal 4 to 20mA output span.
Output Response Time (for input step change): 980mS typical to 98% of final output value.
Accuracy (overall input to output): ±0.1% of output span.

Environmental

Ambient Temperature:
Operating: -25 to 75°C (-13 to 167°F)
Storage: -40 to 85°C (-40 to 185°F)
Relative Humidity: 5 to 95%, non-condensing
Power Requirement: 12 to 50V DC @ 25mA for each output channel
Isolation: Inputs, outputs, and individual channels are isolated from each other for common-mode voltages up to 250V AC, or 354V DC off ground, on a continuous basis (will withstand 1500V AC dielectric strength test for one minute without breakdown).
Radiated Field Immunity (RFI): Designed to comply with EN61000-4-3 Level 3 and EN50082-1
Electromagnetic Field Immunity (EMI): Less than ±0.25% of output span effect
Electrical Fast Transient (EFT): Complies with EN61000-4-4 Level 3 (2KV) and EN50082-1
Electrostatic Discharge (ESD): Complies with EN61000-4-2 Level 3 (8KV air or 4KV direct) and EN50082-1
Radiated Emissions: Meets or exceeds EN50081-1 for Class B equipment
Approvals:
UL & cUL listed
Hazardous Locations: Class I: Div. 2; Groups A, B, C, D

Physical

Enclosure: Case: Self-extinguishing NYLON type 6.6 polyamide thermoplastic UL94 V-2 NEMA Type 1 enclosure.
Connectors (Removable Terminal Blocks): Wire Range: AWG #12-24
Printed Circuit Boards: Military grade FR-4 epoxy glass circuit board
Dimensions:
1.05W x 4.68H x 4.35D inches
26.7W x 118.9H x 110.5D millimeters
Shipping Weight:
1 pound (0.45 Kg) packed

  • DIP switch-configuration simplifies installation without analog pots, jumpers, or software
  • Isolation eliminates ground loops, reduces noise, and blocks transient signals
  • One-step calibration with increase/decrease toggle switches simplifies field adjustments for faster and easier maintenance
  • Automatic self-calibration compensates for temperature effects and component aging to deliver maintenance-free operation
  • Configuration lockout safety feature helps prevent tampering and accidental calibration changes
  • Reverse-acting output capability enables inverse proportional control signals
  • Dual channel model saves space and reduces equipment costs
  • High-resolution 16-bit sigma-delta A/D converters deliver superior accuracy for more reliable measurements
  • Built-in transient voltage suppressors protect circuitry from electrical interference
  • Operating temperature range: -25 to 75°C (-13 to 167°C)

Specs & Catalogs

Manuals

654T User Manual (Log in to download the file)

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Additional information

Weight 8 oz
Dimensions 12 × 13 × 3 in
Part Number

TBK-B01: two 6-position barrier strip style, TBK-B02: four 6-position barrier strip style, TBK-B03: one 3-position and three 6-position barrier strip style, TBK-S01: two 6-position spring clamp style, TBK-S02: four 6-position spring clamp style, TBK-S03: one 3-position and three 6-position spring clamp style

  • Description

    These optional terminal blocks provide safe and secure wiring connections. Large captive screw terminals or spring clamps enable fast, easy connections. Pluggable terminals are removable for simple disconnection of the module without disturbing the wiring.

    Optional terminal blocks are compatible with Acromag’s “white box” modules including BusWorks 900 Series, IntelliPack 800 Series, and isolated transmitters 600 Series.

    Barrier Strip Terminal Blocks

    Wire Range: 12-26 AWG
    Safety Ratings: UL, CSA, CE, TUV.
    Current/Voltage Rating: 15A, 300V.
    Pin Spacing: 5.08mm (0.2”).
    Housing Material: PPO, UL 94 V-0, Black.
    Contacts: Tin-Lead Plated Phosphor Bronze.
    Screw: M3, Nickel Plated Steel.
    Insulation Resistance: ≥105 Megohms.
    Dielectric Withstand: <3000V.

    Spring Clamp Terminal Blocks

    Wire Range: 12-28 AWG.
    Safety Ratings: UL, CSA, CE, TUV.
    Current/Voltage Rating: 15A, 300V.
    Pin Spacing: 5.08mm (0.2”)
    Housing Material: PPO, UL 94 V-0, Black.
    Contacts: Tin-Lead Plated Phosphor Bronze.
    Spring Clamp: Stainless Steel.
    Insulation Resistance: ≥105 Megohms.
    Dielectric Withstand: <3000V.

    Acromag Standard Cage Clamp Terminal Blocks

    Wire Range: 12-24 AWG.
    Current/Voltage Rating: 12A, 300V (UL).
    Pin Spacing: 5.08mm (0.2”).
    Housing Material: UL 94 V-0.
    Terminal: Brass, nickel plated.
    Wire Protector with Contact: Copper alloy tin plating.
    Screw: M3, steel, nickel over copper plating.
    Contact Resistance: ≤10 milliohms per circuit.

  • Features & Benefits

    • DIP switch-configuration simplifies installation without analog pots, jumpers, or software
    • Isolation eliminates ground loops, reduces noise, and blocks transient signals
    • One-step calibration with increase/decrease toggle switches simplifies field adjustments for faster and easier maintenance
    • Automatic self-calibration compensates for temperature effects and component aging to deliver maintenance-free operation
    • Configuration lockout safety feature helps prevent tampering and accidental calibration changes
    • Reverse-acting output capability enables inverse proportional control signals
    • Dual channel model saves space and reduces equipment costs
    • High-resolution 16-bit sigma-delta A/D converters deliver superior accuracy for more reliable measurements
    • Built-in transient voltage suppressors protect circuitry from electrical interference
    • Operating temperature range: -25 to 75°C (-13 to 167°C)
  • Specs & Data Sheets

    Specs & Catalogs

    Manuals

    654T User Manual (Log in to download the file)

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      $10$20
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      • Universal Input (85-264V AC / 100-370V DC)
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      • Simplifies wiring connections on Acromag I/O Modules
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  • Additional information

    Additional information

    Weight 8 oz
    Dimensions 12 × 13 × 3 in
    Part Number

    TBK-B01: two 6-position barrier strip style, TBK-B02: four 6-position barrier strip style, TBK-B03: one 3-position and three 6-position barrier strip style, TBK-S01: two 6-position spring clamp style, TBK-S02: four 6-position spring clamp style, TBK-S03: one 3-position and three 6-position spring clamp style