microBlox® Transmitter/Alarm Carrier
Model uBTA-H-1MR/uBTA-H-1SR/uBTX-H-1
Acromag, Inc. Tel: 248-295-0880
- 23 -
http://www.acromag.com
- 23 -
https://www.acromag.com
Alarm Relay Outputs
Relay Terminals are located at TB5 (Relay 1) and TB6 (Relay 2).
Mechanical Relay Model
(-1MR Suffix Model)
This model contains two
independent electromechanical
relays. Each relay may have its own
set-point, dead-band, and reverse
acting status setting.
A High or Low limit or a window
Alarm may be configured for each
relay.
Type:
Dual 1 FORM C (Two SPDT, Normally Open & Normally Closed contacts).
Ratings:
5A, 250VAC/30VDC, no deration required over temperature.
Minimum Switching Load:
100mA, 5VDC.
Electrical Life:
50x10
3
operations minimum, N.O. contact; 30x10
3
operations
minimum, N.C. contact at 5A, 250VAC/30VDC resistive.
Mechanical Life:
10x10
6
operations minimum.
Contact Material:
Silver-tin oxide (AgSnO2).
Dielectric Strength:
Between open contacts: 1000VACrms, 50-60Hz, 1 minute,
10mA detection current; Between coil and contacts: 4000VAC, 50-60Hz, 1
minute, 10mA detection current.
Solid-State Relay Model
(-1SR Suffix Model)
This model contains two
independent solid-state relay
contacts. Each relay may have its
own set-point, dead-band, and
reverse acting status set.
A High or Low limit or a window
Alarm may be configured for each
relay.
Both uBTA-H-1x Models
Type:
Dual 1 FORM A (Two SPST, Normally Open contacts).
Ratings:
Solid-state relays are AC and DC rated for up to 1A and 200Vpk at 25°C.
Due to greater temperature inside the instrument enclosure, reduce the
maximum relay load current above 10°C ambient according to the equation:
Load_Current = 1.08A-(Ambient°C)*(0.42/50), up to 75°C maximum ambient.
IMPORTANT
: This solid-state output is AC and DC rated. As such, it does not
include any switch protection for inductive loads
—
You must add protection for
inductive loads or damage to this output switch could result (see Add Contact
Protection when Switching Inductive Loads).
Contact Resistance:
0.7Ω typical, 1.1Ω maximum.
Off-State Leakage Current:
10uA maximum.
Relay Response Time:
Relay contacts will switch within 15ms (8ms typical) for
an input step change from 10% of span on one side of an alarm level to 5% of
span on the other side of the alarm level. Your relay response time will vary
with your input module’s bandwidth/respon
se time. For 1KHz wide-bandwidth
modules, this carrier will track a sinusoidal peak alarm up to 75Hz.
Note (for Larger Relay Loads):
To control a higher amperage device, such as a
pump, an interposing relay may be used (see Interposing Relay Connections).
Note (for Output Protection):
External contact protection is required for use
with inductive loads (see Contact Protection Connections). Failure to use this
protection may reduce contact life, damage the unit, and increase emissions.
Transmitter Outputs
The transmitter current and voltage output connections are located at TB4.
All Models
This carrier may also function as a simple analog transmitter for simultaneous
voltage and current output. Transmitter operation does not require Bluetooth
wireless technology and supports any 0-5V output microBlox® model, which
drives 0-5V and 0-20mA outputs on the carrier. Only Bluetooth wireless
technology models are required to utilize carrier alarm capability, or to
optionally scale a sub-range of the input to drive 0-5V output and 0-20mA on
the carrier. Note that transmitter outputs share a common connection.