ROC364 Instruction Manual
3-33
Input and Output Modules
Rev Jun/05
Analog Output Source Specifications (Continued)
CURRENT OUTPUT
Type:
Current loop.
Range:
4 to 20 mA with 0 to 22 mA overranging,
adjusted by scaling resistor. A 0
Ω
resistor is
supplied.
Loop Source:
11 to 30 V dc, as supplied by ROC
for “+T” power (typically 24 V dc).
Loop Resistance at 12 V dc:
0
Ω
minimum,
250
Ω
maximum.
Loop Resistance at 24 V dc:
200
Ω
minimum,
750
Ω
maximum.
Resolution:
12 bits.
Accuracy:
0.1% of full-scale output at 20 to 30
°
C
(68 to 86
°
F). 0.5% of full-scale at –40 to 65
°
C
(–40 to 149
°
F).
Settling Time:
100 µs maximum.
Reset Action:
Output returns to zero percent
output or last value (software configurable) on
power-up (Warm Start) or on watchdog timeout.
POWER REQUIREMENTS
Module Alone:
24 mW typical.
Module w/Current Loop:
400 mW @ 4 mA output
to 590 mW @ 20 mA output.
OUTPUT ISOLATION
Not isolated. Terminal C tied to power supply
common.
VIBRATION
20 Gs peak or 0.06 in. double amplitude,
10 to 2,000 Hz, per MIL-STD-202 method 204
condition F.
MECHANICAL SHOCK
1500 Gs 0.5 ms half sine per MIL-STD-202,
method 213, condition F.
WEIGHT
37 g (1.3 oz) typical.
CASE
Solvent-resistant thermoplastic polyester, meets
UL94V-0.
Dimensions are 15 mm by 32 mm by 43 mm (0.6
in. D by 1.265 in. H by 1.69 in. W), not including
pins.
ENVIRONMENTAL
Meets the Environmental specifications of the ROC
in which the module is installed, including
Temperature, Humidity, and Transient Protection.
APPROVALS
Approved by CSA for hazardous locations Class I,
Division 2, Groups A, B, C, and D.
3.7.4 Discrete Input Modules—Source and Isolated
Discrete Input Source Module Specifications
FIELD WIRING TERMINALS
A:
Not used.
B:
Discrete device source/signal.
C:
Common.
INPUT
Type:
Contact sense.
Range:
Inactive: 0 to 0.5 mA. Active: 2 to 9 mA.
Source Voltage:
11 to 30 V dc.
Source Current:
Determined by source voltage
(Vs), loop resistance (Rl), and scaling resistor (Rs,
10
Ω
supplied):
I = (Vs – 1)/(3.3K + Rl + Rs)
POWER REQUIREMENTS
Source Input:
9 mA maximum from ROC power
supply.
Module:
4.9 to 5.1 V dc, 1 mA maximum (supplied
by ROC).
INPUT ISOLATION
Not isolated. Terminal C tied to power supply
common.
