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WATLOW Series 988 User’s Manual A.11
Appendix
Model Number
Ordering Information
(1237)
To order, complete the code number to the right with the information below:
9 8 _ _ - _ _ _ _ - _ _ _ _
Series 988: a single-channel, temperature/process controller,
1 analog input, 1 digital input, 1 analog or digital input, 4 outputs.
Power Supply & Mounting
6 = 24 to 28Vı (ac/dc) nominal, vertical mounting
7 = 24 to 28Vı (ac/dc) nominal, horizontal mounting
8 = 100 to 240Vı (ac/dc) nominal vertical mounting
9 = 100 to 240Vı (ac/dc) nominal horizontal mounting
Software
A = Standard
B = Enhanced (Includes cascade, ratio, |
duplex, dual PID set)
Input 1
1 = Thermocouple only (Excluding Type B, R, and S)
2 = Universal signal conditioner
Input 2
0 = None
1 = Thermocouple only (Excluding Type B, R, and S)
2 = Universal signal conditioner
3 = Slidewire feedback
4 = Current transformer
2
5 = Digital contact event (One digital event is standard on all units)
Output 1
B = Solid-state relay, Form A, 0.5A, with RC suppression (NO & C)
C = Switched dc or open collector, isolated
D = Electromechanical relay
1
, Form C, 5A with RC suppression
E = Electromechanical relay
1
, Form C, 5A without contact suppression
F = Universal process, 0-5VÎ (dc), 1-5VÎ (dc), 0-10VÎ (dc),
0-20mA, 4-20mA, isolated
K = Solid-state relay, Form A, 0.5A, without contact suppression (NO & C)
Output 2
A = None
B = Solid-state relay, Form A, 0.5A, with RC suppression (NO & C)
C = Switched dc or open collector, isolated
D = Electromechanical relay
1
, Form C, 5A with RC suppression (NO, NC & C)
E = Electromechanical relay
1
, Form C, 5A without contact suppression (NO, NC & C)
F = Universal process 0-5VÎ (dc), 1-5VÎ (dc), 0-10VÎ (dc),
0-20mA, 4-20mA, isolated
K = Solid-state relay, Form A, 0.5A, without contact suppression (NO & C)
T = External signal conditioner power supply, 5, 12 or 20VÎ (dc) @ 30mA
Output 3
A = None
B = Solid-state relay, Form A, 0.5A, with RC suppression (NO & C)
C = Switched dc or open collector, isolated
J = Electromechanical relay
1
, Form A or B, 5A without contact suppression (NO or NC)
K = Solid-state relay, Form A, 0.5A without contact suppression (NO & C)
M = Retransmit, 0-20mA, 4-20mA
N = Retransmit, 0-5VÎ (dc), 1-5VÎ (dc), 0-10VÎ (dc)
T = External signal conditioner power supply, 5, 12 or 20VÎ (dc) @ 30mA
Output 4
A = None
B = Solid-state relay, Form A, 0.5A, with RC suppression (NO & C)
C = Switched dc or open collector, isolated
D = Electromechanical relay
1
, Form C, 5A with RC suppression (NO, NC & C)
E = Electromechanical relay
1
, Form C, 5A without contact suppression (NO, NC & C)
K = Solid-state relay, Form A, 0.5A without contact suppression (NO & C)
R = EIA/TIA-232 communications, opto-isolated
S = EIA/TIA-485 / EIA/TIA-422 communications, opto-isolated
T = External signal conditioner power supply, 5, 12 or 20VÎ (dc) @ 30mA
U = EIA/TIA-485 / EIA/TIA-232 communications, opto-isolated
Display
GG = Green/Green displays RR = Red/Red displays
GR = Green/Red displays XX = Custom overlays or default settings
RG = Red/Green displays
1
Electromechanical relays
warranted for 100,000 clo-
sures only. Solid-state
switching devices recom-
mended for applications
requiring fast cycle times or
extended service life.
2
A Current Transformer input
cannot be used in conjunc-
tion with a process output
installed on output 1.
Slo-Blo
®
is a registered
trademark of Littelfuse, Inc.