BENTLY 3500/61

Description

Description
The 3500/60 & 61 modules provide six channels of temperature monitoring and
accept both Resistance Temperature Detector (RTD) and Thermocouple (TC)
temperature inputs. The modules condition these inputs and compare them
against user-programmable alarm setpoints. The 3500/60 and 3500/61 provide
identical functionality except that the 3500/61 provides recorder outputs for
each of its six channels while the 3500/60 does not.
The user programs the modules to perform either RTD or TC temperature
measurements using the 3500 Rack Configuration Software. Different I/O
modules are available in RTD/TC non-isolated or TC isolated versions. The user
can configure the RTD/TC non-isolated version to accept either TC or RTD, or a
mixture of TC and RTD inputs. The TC isolated version provides 250 Vdc of
channel-to-channel isolation to protect against external interference.
When used in a Triple Modular Redundant (TMR) configuration, temperature
monitors must be installed adjacent to each other in groups of three. When used
in this configuration, the system employs two types of voting to ensure accurate
operation and to avoid single-point failures.

Specifications
Inputs
Signal
Accepts from 1 to 6 RTD or TC
transducer signals.
Input
Impedance
Greater than 10 M for each lead
input.
Power
Consumption
3500/60: Nominal consumption of
7 watts.
3500/61: Nominal consumption of
9 watts.
Tranducers
TCs
Type E: -100 C to +1000 C,
(-148 F to +1832 F).
Type J: 0 C to +760 C,
(+32 F to +1400 F).
Type K: 0 C to +1370 C,
(+32 F to +2498 F).
Type T: -160 C to +400 C,
(-256 F to +752 F).
RTDs
100 3-wire & 4-wire platinum
RTD (alpha = 0.00385):
**-200 C to +850 C
(-328 F to +1562 F).
With external barriers:
-50 C to +850 C
(-122 F to +1562 F).